Revise QDeclarativeChangeSet.

Represent moves as associated Removes and Inserts instead of discrete
actions.  Add API for applying a set of changes to another change set.

Change-Id: Id97c1648c7480023dbfef325150bb81c2fea95c0
Reviewed-on: http://codereview.qt.nokia.com/2720
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Andrew den Exter <andrew.den-exter@nokia.com>

3 files changed, 1002 insertions, 816 deletions

diff --git a/src/declarative/util/qdeclarativechangeset.cpp b/src/declarative/util/qdeclarativechangeset.cpp
index 737031be05..a10693f525 100644
--- a/src/declarative/util/qdeclarativechangeset.cpp
+++ b/src/declarative/util/qdeclarativechangeset.cpp
@@ -41,379 +41,383 @@
 
 #include "qdeclarativechangeset_p.h"
 
-void QDeclarativeChangeSet::insertInsert(int start, int end)
+QDeclarativeChangeSet::QDeclarativeChangeSet()
+    : m_moveCounter(0)
 {
-    const int count = end - start;
-
-    // Moved signals.
-    QVector<Move>::iterator move = m_moves.begin();
-    for (; move != m_moves.end() && start >= move->maximum(); ++move) {}
-    for (; move != m_moves.end() && end >= move->minimum(); ++move) {
-        if (start <= move->tstart) {
-            move->tstart += count;
-            move->tend += count;
-        } else if (start < move->tend) {
-            int relativeStart = start - move->tstart;
-
-            move = m_moves.insert(move, Move(
-                    move->fstart + count, move->fstart + count + relativeStart, move->tstart));
-            ++move;
-            move->fstart += relativeStart;
-            move->tstart += count + relativeStart;
-            move->tend += count;
-
-            start -= relativeStart;
-            end -= relativeStart;
-        } else {
-            start -= move->count();
-            end -= move->count();
-        }
+}
 
-        if (start <= move->fstart) {
-            move->fstart += count;
-            move->fend += count;
-        } else if (start < move->tstart) {
-            start += move->count();
-            end += move->count();
-        }
+QDeclarativeChangeSet::QDeclarativeChangeSet(const QDeclarativeChangeSet &changeSet)
+    : m_removes(changeSet.m_removes)
+    , m_inserts(changeSet.m_inserts)
+    , m_changes(changeSet.m_changes)
+    , m_moveCounter(changeSet.m_moveCounter)
+{
+}
 
-    }
-    for (; move != m_moves.end(); ++move) {
-        move->fstart += count;
-        move->fend += count;
-        move->tstart += count;
-        move->tend += count;
-    }
+QDeclarativeChangeSet::~QDeclarativeChangeSet()
+{
+}
 
-    // Inserted signals.
-    QVector<Insert>::iterator insert = m_inserts.begin();
-    for (; insert != m_inserts.end(); ++insert) {
-        if (start < insert->start) {
-            insert = m_inserts.insert(insert, Insert(start, end));
-            break;
-        } else if (start <= insert->end) {
-            insert->end += count;
-            break;
-        }
-    }
-    if (insert == m_inserts.end()) {
-        m_inserts.append(Insert(start, end));
-    } else for (++insert; insert != m_inserts.end(); ++insert) {
-        insert->start += count;
-        insert->end += count;
-    }
+QDeclarativeChangeSet &QDeclarativeChangeSet::operator =(const QDeclarativeChangeSet &changeSet)
+{
+    m_removes = changeSet.m_removes;
+    m_inserts = changeSet.m_inserts;
+    m_changes = changeSet.m_changes;
+    m_moveCounter = changeSet.m_moveCounter;
+    return *this;
+}
 
+void QDeclarativeChangeSet::insert(int index, int count)
+{
+    applyInsertions(QVector<Insert>() << Insert(index, count));
+}
 
-    // Changed signals.
-    QVector<Change>::iterator change = m_changes.begin();
-    for (; change != m_changes.end() && start != change->start && start < change->end; ++change) {
-        if (start > change->start) {
-            int relativeStart = start - change->start;
-            change = m_changes.insert(change, Change(change->start, change->start + relativeStart));
-            ++change;
-            change->start += count + relativeStart;
-            change->end += count - relativeStart;
-            break;
-        }
-    }
-    for (; change != m_changes.end(); ++change) {
-        change->start += count;
-        change->end += count;
-    }
+void QDeclarativeChangeSet::remove(int index, int count)
+{
+    QVector<Insert> i;
+    applyRemovals(QVector<Remove>() << Remove(index, count), i);
 }
 
-void QDeclarativeChangeSet::insertRemove(int start, int end)
+void QDeclarativeChangeSet::move(int from, int to, int count)
 {
-    // Changed Signals.
-    QVector<Change>::iterator change = m_changes.begin();
-    for (; change != m_changes.end() && start >= change->end; ++change) {}
-    for (; change != m_changes.end() && end < change->start; ++change) {
-        const int removeCount = qMin(change->end, end) - qMax(change->start, start);
-        change->end -= removeCount;
-        if (change->start == change->end) {
-            change = m_changes.erase(change);
-        } else if (start < change->start) {
-            change->start = start;
-        }
-    }
-    const int count = end - start;
-    for (; change != m_changes.end(); ++change) {
-        change->start -= count;
-        change->end -= count;
-    }
+    apply(QVector<Remove>() << Remove(from, count, -2), QVector<Insert>() << Insert(to, count, -2));
+}
 
-    QVector<Remove> removeChanges;
-
-    // Moved signals.
-    QVector<Move>::iterator move = m_moves.begin();
-    for (; move != m_moves.end() && start >= move->maximum(); ++move) {}
-    for (; move != m_moves.end() && end >= move->minimum(); ++move) {
-        if (move->fstart < move->tstart) {
-            if (start < move->fstart) {
-                const int difference = move->fstart - start;
-                move->fend -= difference;
-                move->fstart = start;
-                move->tstart -= difference;
-                move->tend -= difference;
-
-                removeChanges.append(Remove(start, start + difference));
-                end -= difference;
-            }
-            if (end < move->tstart) {
-                move->tstart -= end - start;
-                move->tend -= end - start;
-            } else if (start < move->tend) {
-                const int difference = qMin(move->tend, end) - move->tstart;
-                removeChanges.append(Remove(
-                        move->fstart , move->fstart + difference));
-                end -= difference;
-
-                move->fend -= difference;
-                move->tstart -= end - start;
-                move->tend -=  end - start + difference;
-            }
-            start += move->count();
-            end += move->count();
-        } else {
-            if (start < move->tend) {
-                const int offset = qMax(0, start - move->tstart);
-                const int difference = qMin(move->tend, end) - qMax(move->tstart, start);
-
-                removeChanges.append(Remove(
-                        move->fstart + offset, move->fstart + offset + difference));
-                start -= offset;
-                end -= offset + difference;
-
-                move->fend -= difference;
-                move->tstart = start;
-                move->tend = start + move->fend - move->fstart;
-            } else {
-                start -= move->count();
-                end -= move->count();
-            }
+void QDeclarativeChangeSet::change(int index, int count)
+{
+    applyChanges(QVector<Change>() << Change(index, count));
+}
+
+void QDeclarativeChangeSet::apply(const QDeclarativeChangeSet &changeSet)
+{
+    apply(changeSet.m_removes, changeSet.m_inserts, changeSet.m_changes);
+}
+
+void QDeclarativeChangeSet::apply(const QVector<Remove> &removals)
+{
+    QVector<Remove> r = removals;
+    QVector<Insert> i;
+    applyRemovals(r, i);
+}
+
+void QDeclarativeChangeSet::apply(const QVector<Insert> &insertions)
+{
+    QVector<Insert> i = insertions;
+    applyInsertions(i);
+}
 
-            move->fstart -= end - start;
-            move->fend -= end - start;
-
-            if (start > move->fstart) {
-                const int offset = start - move->fstart;
-                const int difference = qMin(move->fend, end) - start;
-                removeChanges.append(Remove(
-                        move->fstart + end - start + offset + difference ,
-                        move->fend + end - start + offset));
-                end -= offset;
-                move->fstart += offset;
-                move->fend += offset;
+void QDeclarativeChangeSet::apply(const QVector<Change> &changes)
+{
+    QVector<Change> c = changes;
+    applyChanges(c);
+}
+
+void QDeclarativeChangeSet::apply(const QVector<Remove> &removals, const QVector<Insert> &insertions, const QVector<Change> &changes)
+{
+    QVector<Remove> r = removals;
+    QVector<Insert> i = insertions;
+    QVector<Change> c = changes;
+    applyRemovals(r, i);
+    applyInsertions(i);
+    applyChanges(c);
+}
+
+void QDeclarativeChangeSet::applyRemovals(QVector<Remove> &removals, QVector<Insert> &insertions)
+{
+    int removeCount = 0;
+    int insertCount = 0;
+    QVector<Insert>::iterator insert = m_inserts.begin();
+    QVector<Change>::iterator change = m_changes.begin();
+    QVector<Remove>::iterator rit = removals.begin();
+    for (; rit != removals.end(); ++rit) {
+        int index = rit->index + removeCount;
+        int count = rit->count;
+
+        QVector<Insert>::iterator iit = insertions.begin();
+        for (; rit->moveId != -1 && iit != insertions.end() && iit->moveId != rit->moveId; ++iit) {}
+        for (; change != m_changes.end() && change->end() < rit->index; ++change) {}
+        for (; change != m_changes.end() && change->index > rit->end(); ++change) {
+            change->count -= qMin(change->end(), rit->end()) - qMax(change->index, rit->index);
+            if (change->count == 0) {
+                change = m_changes.erase(change);
+            } else if (rit->index < change->index) {
+                change->index = rit->index;
             }
         }
-
-        if (move->tstart == move->tend || move->fstart == move->tstart) {
-            move = m_moves.erase(move);
-            --move;
+        for (; insert != m_inserts.end() && insert->end() <= index; ++insert) {
+            insertCount += insert->count;
+            insert->index -= removeCount;
         }
-    }
-    for (; move != m_moves.end(); ++move) {
-        move->fstart -= count;
-        move->fend -= count;
-        move->tstart -= count;
-        move->tend -= count;
-    }
+        for (; insert != m_inserts.end() && insert->index < index + count; ++insert) {
+            const int offset = insert->index - index;
+            const int difference = qMin(insert->end(), index + count) - qMax(insert->index, index);
+            const int moveId = rit->moveId != -1 ? m_moveCounter++ : -1;
+            if (insert->moveId != -1) {
+                QVector<Remove>::iterator remove = m_removes.begin();
+                for (; remove != m_removes.end() && remove->moveId != insert->moveId; ++remove) {}
+                Q_ASSERT(remove != m_removes.end());
+                const int offset = index - insert->index;
+                if (rit->moveId != -1 && offset < 0) {
+                    const int moveId = m_moveCounter++;
+                    iit = insertions.insert(iit, Insert(iit->index, -offset, moveId));
+                    ++iit;
+                    iit->index += -offset;
+                    iit->count -= -offset;
+                    rit = removals.insert(rit, Remove(rit->index, -offset, moveId));
+                    ++rit;
+                    rit->count -= -offset;
+                }
+
+                if (offset > 0) {
+                    const int moveId = m_moveCounter++;
+                    insert = m_inserts.insert(insert, Insert(insert->index, offset, moveId));
+                    ++insert;
+                    insert->index += offset;
+                    insert->count -= offset;
+                    remove = m_removes.insert(remove, Remove(remove->index, offset, moveId));
+                    ++remove;
+                    remove->count -= offset;
+                    rit->index -= offset;
+                    index += offset;
+                    count -= offset;
+                }
 
-    if (start != end)
-        removeChanges.append(Remove(start, end));
+                if (remove->count == difference) {
+                    remove->moveId = moveId;
+                } else {
+                    remove = m_removes.insert(remove, Remove(remove->index, difference, moveId));
+                    ++remove;
+                    remove->count -= difference;
+                }
+            } else if (rit->moveId != -1 && offset > 0) {
+                const int moveId = m_moveCounter++;
+                iit = insertions.insert(iit, Insert(iit->index, offset, moveId));
+                ++iit;
+                iit->index += offset;
+                iit->count -= offset;
+                rit = removals.insert(rit, Remove(rit->index, offset, moveId));
+                ++rit;
+                rit->count -= offset;
+                index += offset;
+                count -= offset;
+            }
 
-    foreach (const Remove &r, removeChanges) {
-        int start = r.start;
-        int end = r.end;
+            if (rit->moveId != -1 && difference > 0) {
+                iit = insertions.insert(iit, Insert(iit->index, difference, moveId));
+                ++iit;
+                iit->index += difference;
+                iit->count -= difference;
+            }
 
-        QVector<Insert>::iterator insert = m_inserts.end() - 1;
-        for (const int count = end - start; insert != m_inserts.begin() - 1 && insert->start >= end; --insert) {
-                insert->start -= count;
-                insert->end -= count;
-        }
-        for (; insert != m_inserts.begin() - 1 && insert->end > start; --insert) {
-            const int removeCount = qMin(insert->end, end) - qMax(insert->start, start);
-            insert->end -= removeCount;
-            if (insert->start == insert->end) {
+            insert->count -= difference;
+            rit->count -= difference;
+            if (insert->count == 0) {
                 insert = m_inserts.erase(insert);
-            } else if (start < insert->start) {
-                insert->end -= insert->start - start;
-                insert->start = start;
+                --insert;
+            } else if (index <= insert->index) {
+                insert->index = rit->index;
             } else {
-                start -= insert->count();
-                end -= insert->count();
+                rit->index -= insert->count;
             }
-            end -= removeCount;
-            if (start == end)
-                 return;
-         }
-        // Adjust the index to compensate for any inserts prior to the remove position..
-        for (; insert != m_inserts.begin() - 1; --insert) {
-            start -= insert->count();
-            end -= insert->count();
+            index += difference;
+            count -= difference;
+            removeCount += difference;
         }
+        rit->index -= insertCount;
+        removeCount += rit->count;
+
+        if (rit->count == 0) {
+            if (rit->moveId != -1 && iit->count == 0)
+                insertions.erase(iit);
+            rit = removals.erase(rit);
+            --rit;
+        } else if (rit->moveId != -1) {
+            const int moveId = m_moveCounter++;
+            rit->moveId = moveId;
+            iit->moveId = moveId;
+        }
+    }
+    for (; change != m_changes.end(); ++change)
+        change->index -= removeCount;
+    for (; insert != m_inserts.end(); ++insert)
+        insert->index -= removeCount;
+
+    removeCount = 0;
+    QVector<Remove>::iterator remove = m_removes.begin();
+    for (rit = removals.begin(); rit != removals.end(); ++rit) {
+        QVector<Insert>::iterator iit = insertions.begin();
+        int index = rit->index + removeCount;
+        for (; rit->moveId != -1 && iit != insertions.end() && iit->moveId != rit->moveId; ++iit) {}
+        for (; remove != m_removes.end() && index > remove->index; ++remove)
+            remove->index -= removeCount;
+        while (remove != m_removes.end() && index + rit->count > remove->index) {
+            int count = 0;
+            const int offset = remove->index - index - removeCount;
+            QVector<Remove>::iterator rend = remove;
+            for (; rend != m_removes.end()
+                    && rit->moveId == -1
+                    && rend->moveId == -1
+                    && rit->index + rit->count > rend->index; ++rend) {
+                count += rend->count;
+            }
+            if (remove != rend) {
+                const int difference = rend == m_removes.end() || rit->index + rit->count < rend->index - removeCount
+                        ? rit->count
+                        : offset;
+                count += difference;
+
+                index += difference;
+                rit->count -= difference;
+                removeCount += difference;
+
+                remove->index = rit->index;
+                remove->count = count;
+                remove = m_removes.erase(++remove, rend);
+            } else if (rit->moveId != -1) {
+                if (offset > 0) {
+                    const int moveId = m_moveCounter++;
+                    iit = insertions.insert(iit, Insert(iit->index, offset, moveId));
+                    ++iit;
+                    iit->index += offset;
+                    iit->count -= offset;
+                    remove = m_removes.insert(remove, Remove(rit->index, offset, moveId));
+                    ++remove;
+                    rit->count -= offset;
+                }
+                remove->index = rit->index;
+                index += offset;
+                removeCount += offset;
 
-        // Removed signals.
-        QVector<Remove>::iterator remove = m_removes.begin();
-        for (; remove != m_removes.end(); ++remove) {
-            if (end < remove->start) {
-                remove = m_removes.insert(remove, Remove(start, end));
-                break;
-            } else if (start <= remove->start) {
-                remove->end += end - remove->start;
-                remove->start = start;
-
-                QVector<Remove>::iterator rbegin = remove;
-                QVector<Remove>::iterator rend = ++rbegin;
-                for (; rend != m_removes.end() && rend->start <= remove->end; ++rend)
-                    remove->end += rend->count();
-                if (rbegin != rend) {
-                    remove = m_removes.erase(rbegin, rend);
+                ++remove;
+            } else {
+                if (offset > 0) {
+                    remove = m_removes.insert(remove, Remove(rit->index, offset));
+                    ++remove;
+                    rit->count -= offset;
                 }
-                break;
+                remove->index = rit->index;
+                index += offset;
+                removeCount += offset;
+
+                ++remove;
             }
+            index += count;
+            rit->count -= count;
         }
-        if (remove != m_removes.end()) {
-            const int count = end - start;
-            for (++remove; remove != m_removes.end(); ++remove) {
-                remove->start -= count;
-                remove->end -= count;
-            }
-        } else {
-            m_removes.append(Remove(start, end));
+
+        if (rit->count > 0) {
+            remove = m_removes.insert(remove, *rit);
+            ++remove;
         }
+        removeCount += rit->count;
     }
+    for (; remove != m_removes.end(); ++remove)
+        remove->index -= removeCount;
 }
 
-void QDeclarativeChangeSet::insertMove(int start, int end, int to)
+void QDeclarativeChangeSet::applyInsertions(QVector<Insert> &insertions)
 {
-    QVector<Insert> insertChanges;
-    QVector<Move> moveChanges;
-
-    int fStart = start;
-    int fTo = to;
-    int fEnd = end;
-    int &bStart = fTo;
-    int bEnd = to + end - start;
-
-    if (start > to) {
-        qSwap(fStart, bStart);
-        qSwap(fEnd, bEnd);
-    }
-
-    // Inserted signals.
+    int insertCount = 0;
     QVector<Insert>::iterator insert = m_inserts.begin();
-    if (start < to) {
-        for (; insert != m_inserts.end() && fStart >= insert->end; ++insert) {}
-        for (; insert != m_inserts.end() && fEnd > insert->start; ++insert) {
-            const int removeCount = qMin(insert->end, fEnd) - qMax(insert->start, fStart);
-            const int relativeStart = fStart - insert->start;
-            const int relativeEnd = qMax(0, fEnd - insert->end);
-
-            insert->end -= removeCount;
-            if (insert->start == insert->end) {
-                insert = m_inserts.erase(insert);
-                --insert;
-            }
-
-            if (relativeStart < 0) {
-                moveChanges.append(Move(fStart, fStart - relativeStart, fTo + relativeEnd));
-                fTo -= relativeStart;
-            }
-
-            fTo += removeCount;
-            insertChanges.append(Insert(bEnd - removeCount, bEnd));
+    QVector<Change>::iterator change = m_changes.begin();
+    for (QVector<Insert>::iterator iit = insertions.begin(); iit != insertions.end(); ++iit) {
+        int index = iit->index - insertCount;
+        int count = iit->count;
+        for (; change != m_changes.end() && change->index >= index; ++change)
+            change->index += insertCount;
+        if (change != m_changes.end() && change->index < index + count) {
+                int offset = index - change->index;
+                change = m_changes.insert(change, Change(change->index + insertCount, offset));
+                ++change;
+                change->index += count + offset;
+                change->count -= offset;
         }
-    } else {
-        for (; insert != m_inserts.end() && bStart >= insert->end; ++insert) {}
-        for (; insert != m_inserts.end() && bEnd > insert->start; ++insert) {
-            const int removeCount = qMin(insert->end, bEnd) - qMax(insert->start, bStart);
-            const int relativeStart = bStart - insert->start;
-
-            insert->start += removeCount;
-            if (insert->start == insert->end) {
-                insert->start = fStart;
-                insert->end = insert->start + removeCount;
+        for (; insert != m_inserts.end() && iit->index > insert->index + insert->count; ++insert)
+            insert->index += insertCount;
+        if (insert == m_inserts.end()) {
+            insert = m_inserts.insert(insert, *iit);
+            ++insert;
+        } else {
+            const int offset = index - insert->index;
+            if (offset < 0 || (offset == 0 && (iit->moveId != -1 || insert->moveId != -1))) {
+                insert = m_inserts.insert(insert, *iit);
+                ++insert;
+            } else if (iit->moveId == -1 && insert->moveId == -1) {
+                insert->index -= iit->count;
+                insert->count += iit->count;
+            } else if (offset < insert->count) {
+                const int moveId = insert->moveId != -1 ? m_moveCounter++ : -1;
+                insert = m_inserts.insert(insert, Insert(insert->index + insertCount, offset, moveId));
+                ++insert;
+                insert->index += offset;
+                insert->count -= offset;
+                insert = m_inserts.insert(insert, *iit);
+                ++insert;
+
+                if (insert->moveId != -1) {
+                    QVector<Remove>::iterator remove = m_removes.begin();
+                    for (; remove != m_removes.end() && remove->moveId != insert->moveId; ++remove) {}
+                    Q_ASSERT(remove != m_removes.end());
+                    if (remove->count == offset) {
+                        remove->moveId = moveId;
+                    } else {
+                        remove = m_removes.insert(remove, Remove(remove->index, offset, moveId));
+                        ++remove;
+                        remove->count -= offset;
+                    }
+                }
             } else {
-                insert = m_inserts.insert(insert, Insert(fStart, fStart + removeCount));
+                ++insert;
+                insert = m_inserts.insert(insert, *iit);
                 ++insert;
             }
-            if (relativeStart < 0) {
-                moveChanges.append(Move(fStart, fStart - relativeStart, fTo + removeCount));
-                fStart -= relativeStart;
-                fTo -= relativeStart;
-            }
-            fStart += removeCount;
-            fTo += removeCount;
-        }
-    }
-
-    if (fTo != bEnd)
-        moveChanges.append(Move(fStart, fStart + bEnd - fTo, fTo));
-
-    QVector<Insert>::iterator it = insertChanges.begin();
-    for (insert = m_inserts.begin(); it != insertChanges.end() && insert != m_inserts.end();++insert) {
-        if (it->start < insert->start) {
-            insert = m_inserts.insert(insert, *it);
-            ++it;
-        } else if (it->start <= insert->end) {
-            insert->end += it->count();
-            ++it;
-        }
-    }
-    for (; it != insertChanges.end(); ++it)
-        m_inserts.append(*it);
-
-    // Insert queued moved signals ordered by destination position.
-    QVector<Move>::iterator move = m_moves.begin();
-    if (start > to) {
-        for (QVector<Move>::iterator it = moveChanges.begin(); it != moveChanges.end(); ++it) {
-            it->fend += it->tstart - it->fstart;
-            it->tend -=it->tstart - it->fstart;
-            qSwap(it->fstart, it->tstart);
-            for (; move != m_moves.end() && it->to >= qMin(move->fstart, move->tstart); ++move) {}
-            move = m_moves.insert(move, *it);
-        }
-    } else {
-        for (QVector<Move>::iterator it = moveChanges.begin(); it != moveChanges.end(); ++it) {
-            for (; move != m_moves.end() && it->start >= qMin(move->fstart, move->tstart); ++move) {}
-            move = m_moves.insert(move, *it);
+            insertCount += iit->count;
         }
     }
+    for (; change != m_changes.end(); ++change)
+        change->index += insertCount;
+    for (; insert != m_inserts.end(); ++insert)
+        insert->index += insertCount;
 }
 
-void QDeclarativeChangeSet::insertChange(int start, int end)
+void QDeclarativeChangeSet::applyChanges(QVector<Change> &changes)
 {
-    QVector<Change> filteredChanges;
-
-    // Inserted signals (don't emit change signals on new items).
     QVector<Insert>::iterator insert = m_inserts.begin();
-    for (; insert != m_inserts.end() && start >= insert->end; ++insert) {}
-    for (; insert != m_inserts.end() && end > insert->start; ++insert) {
-        if (start < insert->start)
-            filteredChanges.append(Change(start, insert->start));
-        start = insert->end;
-    }
-    if (start < end)
-        filteredChanges.append(Change(start, end));
-
-    // Find the union of the existing and filtered sets of change signals.
     QVector<Change>::iterator change = m_changes.begin();
-    for (QVector<Change>::iterator it = filteredChanges.begin(); it != filteredChanges.end(); ++it) {
-        for (; change != m_changes.end() && change->end < it->start; ++change) {}
-        if (change == m_changes.end() || change->start > it->end) {
-            change = m_changes.insert(change, *it);
+    for (QVector<Change>::iterator cit = changes.begin(); cit != changes.end(); ++cit) {
+        for (; insert != m_inserts.end() && insert->end() < cit->index; ++insert) {}
+        for (; insert != m_inserts.end() && insert->index < cit->end(); ++insert) {
+            const int offset = insert->index - cit->index;
+            const int count = cit->count + cit->index - insert->index - insert->count;
+            if (offset == 0) {
+                cit->index = insert->index + insert->count;
+                cit->count = count;
+            } else {
+                cit = changes.insert(++cit, Change(insert->index + insert->count, count));
+                --cit;
+                cit->count = offset;
+            }
+        }
+
+        for (; change != m_changes.end() && change->index + change->count < cit->index; ++change) {}
+        if (change == m_changes.end() || change->index > cit->index + cit->count) {
+            if (cit->count > 0) {
+                change = m_changes.insert(change, *cit);
+                ++change;
+            }
         } else {
-            if (it->start < change->start)
-                change->start = it->start;
+            if (cit->index < change->index) {
+                change->count += change->index - cit->index;
+                change->index = cit->index;
+            }
 
-            if (it->end > change->end) {
-                change->end = it->end;
+            if (cit->index + cit->count > change->index + change->count) {
+                change->count = cit->index + cit->count - change->index;
                 QVector<Change>::iterator rbegin = change;
                 QVector<Change>::iterator rend = ++rbegin;
-                for (; rend != m_changes.end() && rend->start <= change->end; ++rend) {
-                    if (rend->end > change->end)
-                        change->end = rend->end;
+                for (; rend != m_changes.end() && rend->index <= change->index + change->count; ++rend) {
+                    if (rend->index + rend->count > change->index + change->count)
+                        change->count = rend->index + rend->count - change->index;
                 }
                 if (rbegin != rend) {
                     change = m_changes.erase(rbegin, rend);
@@ -422,19 +426,29 @@ void QDeclarativeChangeSet::insertChange(int start, int end)
             }
         }
     }
-
 }
 
 QDebug operator <<(QDebug debug, const QDeclarativeChangeSet &set)
 {
-    foreach (const QDeclarativeChangeSet::Remove &remove, set.removes())
-        debug.nospace() << "QDeclarativeChangeSet::Remove(" << remove.start << "," << remove.end << ")";
-    foreach (const QDeclarativeChangeSet::Insert &insert, set.inserts())
-        debug.nospace() << "QDeclarativeChangeSet::Insert(" << insert.start << "," << insert.end << ")";
-    foreach (const QDeclarativeChangeSet::Move &move, set.moves())
-        debug.nospace() << "QDeclarativeChangeSet::Move(" << move.start << "," << move.end << "," << move.to << ")";
-    foreach (const QDeclarativeChangeSet::Change &change, set.changes())
-        debug.nospace() << "QDeclarativeChangeSet::Change(" << change.start << "," << change.end << ")";
-    return debug;
+    debug.nospace() << "QDeclarativeChangeSet(";
+    foreach (const QDeclarativeChangeSet::Remove &remove, set.removes()) debug << remove;
+    foreach (const QDeclarativeChangeSet::Insert &insert, set.inserts()) debug << insert;
+    foreach (const QDeclarativeChangeSet::Change &change, set.changes()) debug << change;
+    return debug.nospace() << ")";
+}
+
+QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Remove &remove)
+{
+    return (debug.nospace() << "Remove(" << remove.index << "," << remove.count << "," << remove.moveId << ")").space();
+}
+
+QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Insert &insert)
+{
+    return (debug.nospace() << "Insert(" << insert.index << "," << insert.count << "," << insert.moveId << ")").space();
+}
+
+QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Change &change)
+{
+    return (debug.nospace() << "Change(" << change.index << "," << change.count << ")").space();
 }
 
diff --git a/src/declarative/util/qdeclarativechangeset_p.h b/src/declarative/util/qdeclarativechangeset_p.h
index ec3429392b..67533b02d5 100644
--- a/src/declarative/util/qdeclarativechangeset_p.h
+++ b/src/declarative/util/qdeclarativechangeset_p.h
@@ -61,103 +61,104 @@ QT_BEGIN_NAMESPACE
 class Q_AUTOTEST_EXPORT QDeclarativeChangeSet
 {
 public:
-    struct Insert
+    struct MoveKey
     {
-        Insert() {}
-        Insert(int start, int end) : start(start), end(end) {}
-
-        int count() const { return end - start; }
-
-        int start;
-        int end;
+        MoveKey() : moveId(-1), offset(0) {}
+        MoveKey(int moveId, int offset) : moveId(moveId), offset(offset) {}
+        int moveId;
+        int offset;
     };
 
-    struct Remove
+    struct Change
     {
-        Remove() {}
-        Remove(int start, int end) : start(start), end(end) {}
+        Change() : index(0), count(0), moveId(-1) {}
+        Change(int index, int count) : index(index), count(count), moveId(-1) {}
+        Change(int index, int count, int moveId) : index(index), count(count), moveId(moveId) {}
 
-        int count() const { return end - start; }
+        int index;
+        int count;
+        int moveId;
 
-        int start;
-        int end;
+        bool isMove() const { return moveId >= 0; }
+
+        MoveKey moveKey(int index) const { return MoveKey(moveId, index - Change::index); }
+
+        int start() const { return index; }
+        int end() const { return index + count; }
     };
 
-    struct Move
+
+    struct Insert : public Change
     {
-        Move() {}
-        Move(int start, int end, int to) : fstart(start), fend(end), tstart(to), tend(to + end - start) {}
-
-        int minimum() const { return qMin(fstart, tstart); }
-        int maximum() const { return qMax(fend, tend); }
-        int count() const { return fend - fstart; }
-
-        union {
-            int start;
-            int fstart;
-        };
-        union {
-            int end;
-            int fend;
-        };
-        union {
-            int to;
-            int tstart;
-        };
-        int tend;
+        Insert() {}
+        Insert(int index, int count) : Change(index, count) {}
+        Insert(int index, int count, int moveId) : Change(index, count, moveId) {}
     };
 
-    struct Change
+    struct Remove : public Change
     {
-        Change() {}
-        Change(int start, int end) : start(start), end(end) {}
+        Remove() {}
+        Remove(int index, int count) : Change(index, count) {}
+        Remove(int index, int count, int moveId) : Change(index, count, moveId) {}
+    };
 
-        int count() const { return end - start; }
+    QDeclarativeChangeSet();
+    QDeclarativeChangeSet(
+            const QVector<Remove> &removals,
+            const QVector<Insert> &insertions,
+            const QVector<Change> &changes = QVector<Change>());
+    QDeclarativeChangeSet(const QDeclarativeChangeSet &changeSet);
+    ~QDeclarativeChangeSet();
 
-        int start;
-        int end;
-    };
+    QDeclarativeChangeSet &operator =(const QDeclarativeChangeSet &changeSet);
 
     const QVector<Remove> &removes() const { return m_removes; }
     const QVector<Insert> &inserts() const { return m_inserts; }
-    const QVector<Move> &moves() const { return m_moves; }
     const QVector<Change> &changes() const {return  m_changes; }
 
-    void insertInsert(int start, int end);
-    void insertRemove(int start, int end);
-    void insertMove(int start, int end, int to);
-    void insertChange(int start, int end);
+    void insert(int index, int count);
+    void remove(int index, int count);
+    void move(int from, int to, int count);
+    void change(int index, int count);
 
-    void appendInsert(int start, int end) { m_inserts.append(Insert(start, end)); }
-    void appendRemove(int start, int end) { m_removes.append(Remove(start, end)); }
-    void appendMove(int start, int end, int to) { m_moves.append(Move(start, end, to)); }
-    void appendChange(int start, int end) { m_changes.append(Change(start, end)); }
+    void apply(const QDeclarativeChangeSet &changeSet);
+    void apply(const QVector<Remove> &removals);
+    void apply(const QVector<Insert> &insertions);
+    void apply(const QVector<Change> &changes);
+    void apply(
+            const QVector<Remove> &removals,
+            const QVector<Insert> &insertions,
+            const QVector<Change> &changes = QVector<Change>());
 
-    void append(const QVector<Insert> &inserts) { m_inserts += inserts; }
-    void append(const QVector<Remove> &removes) { m_removes += removes; }
-    void append(const QVector<Move> &moves) { m_moves += moves; }
-    void append(const QVector<Change> &changes) { m_changes += changes; }
-
-    bool isEmpty() const {
-        return m_removes.empty() && m_inserts.empty() && m_moves.empty() && m_changes.empty();
-    }
+    bool isEmpty() const { return m_removes.empty() && m_inserts.empty() && m_changes.empty(); }
 
     void clear()
     {
         m_removes.clear();
         m_inserts.clear();
-        m_moves.clear();
         m_changes.clear();
+        m_moveCounter = 0;
     }
 
 private:
+    void applyRemovals(QVector<Remove> &removals, QVector<Insert> &insertions);
+    void applyInsertions(QVector<Insert> &insertions);
+    void applyChanges(QVector<Change> &changes);
+
     QVector<Remove> m_removes;
     QVector<Insert> m_inserts;
-    QVector<Move> m_moves;
     QVector<Change> m_changes;
+    int m_moveCounter;
 };
 
+inline uint qHash(const QDeclarativeChangeSet::MoveKey &key) { return qHash(qMakePair(key.moveId, key.offset)); }
+inline bool operator ==(const QDeclarativeChangeSet::MoveKey &l, const QDeclarativeChangeSet::MoveKey &r) {
+    return l.moveId == r.moveId && l.offset == r.offset; }
+
 Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet &change);
+Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Remove &remove);
+Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Insert &insert);
+Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Change &change);
 
 QT_END_NAMESPACE
 
diff --git a/tests/auto/declarative/qdeclarativechangeset/tst_qdeclarativechangeset.cpp b/tests/auto/declarative/qdeclarativechangeset/tst_qdeclarativechangeset.cpp
index 018711ac64..4aaefba7c4 100644
--- a/tests/auto/declarative/qdeclarativechangeset/tst_qdeclarativechangeset.cpp
+++ b/tests/auto/declarative/qdeclarativechangeset/tst_qdeclarativechangeset.cpp
@@ -43,17 +43,16 @@
 
 #define VERIFY_EXPECTED_OUTPUT
 
-
-
 class tst_qdeclarativemodelchange : public QObject
 {
     Q_OBJECT
 public:
     struct Signal
     {
-        int start;
-        int end;
+        int index;
+        int count;
         int to;
+        int moveId;
 
         bool isInsert() const { return to == -1; }
         bool isRemove() const { return to == -2; }
@@ -61,10 +60,10 @@ public:
         bool isChange() const { return to == -3; }
     };
 
-    static Signal Insert(int start, int end) { Signal signal = { start, end, -1 }; return signal; }
-    static Signal Remove(int start, int end) { Signal signal = { start, end, -2 }; return signal; }
-    static Signal Move(int start, int end, int to) { Signal signal = { start, end, to }; return signal; }
-    static Signal Change(int start, int end) { Signal signal = { start, end, -3 }; return signal; }
+    static Signal Insert(int index, int count, int moveId = -1) { Signal signal = { index, count, -1, moveId }; return signal; }
+    static Signal Remove(int index, int count, int moveId = -1) { Signal signal = { index, count, -2, moveId }; return signal; }
+    static Signal Move(int from, int to, int count) { Signal signal = { from, count, to, -1 }; return signal; }
+    static Signal Change(int index, int count) { Signal signal = { index, count, -3, -1 }; return signal; }
 
     typedef QVector<Signal> SignalList;
 
@@ -100,16 +99,24 @@ public:
 
     QVector<int> applyChanges(const QVector<int> &list, const QVector<Signal> &changes)
     {
+        QHash<int, QVector<int> > removedValues;
         QVector<int> alteredList = list;
         foreach (const Signal &signal, changes) {
             if (signal.isInsert()) {
-                alteredList.insert(signal.start, signal.end - signal.start, 100);
+                if (signal.moveId != -1) {
+                    QVector<int> tail = alteredList.mid(signal.index);
+                    alteredList = alteredList.mid(0, signal.index) + removedValues.take(signal.moveId) + tail;
+                } else {
+                    alteredList.insert(signal.index, signal.count, 100);
+                }
             } else if (signal.isRemove()) {
-                alteredList.erase(alteredList.begin() + signal.start, alteredList.begin() + signal.end);
+                if (signal.moveId != -1)
+                    removedValues.insert(signal.moveId, alteredList.mid(signal.index, signal.count));
+                alteredList.erase(alteredList.begin() + signal.index, alteredList.begin() + signal.index + signal.count);
             } else if (signal.isMove()) {
-                move(signal.start, signal.to, signal.end - signal.start, &alteredList);
+                move(signal.index, signal.to, signal.count, &alteredList);
             } else if (signal.isChange()) {
-                for (int i = signal.start; i < signal.end; ++i) {
+                for (int i = signal.index; i < signal.index + signal.count; ++i) {
                     if (alteredList[i] < 100)
                         alteredList[i] = 100;
                 }
@@ -126,19 +133,19 @@ private slots:
 };
 
 bool operator ==(const tst_qdeclarativemodelchange::Signal &left, const tst_qdeclarativemodelchange::Signal &right) {
-    return left.start == right.start && left.end == right.end && left.to == right.to; }
+    return left.index == right.index && left.count == right.count && left.to == right.to; }
 
 
 QDebug operator <<(QDebug debug, const tst_qdeclarativemodelchange::Signal &signal)
 {
     if (signal.isInsert())
-        debug.nospace() << "Insert(" << signal.start << "," << signal.end << ")";
+        debug.nospace() << "Insert(" << signal.index << "," << signal.count << "," << signal.moveId << ")";
     else if (signal.isRemove())
-        debug.nospace() << "Remove(" << signal.start << "," << signal.end << ")";
+        debug.nospace() << "Remove(" << signal.index << "," << signal.count << "," << signal.moveId << ")";
     else if (signal.isMove())
-        debug.nospace() << "Move(" << signal.start << "," << signal.end << "," << signal.to << ")";
+        debug.nospace() << "Move(" << signal.index << "," << signal.to << "," << signal.count << ")";
     else if (signal.isChange())
-        debug.nospace() << "Change(" << signal.start << "," << signal.end << ")";
+        debug.nospace() << "Change(" << signal.index << "," << signal.count << ")";
     return debug;
 }
 
@@ -150,405 +157,571 @@ void tst_qdeclarativemodelchange::sequence_data()
     QTest::addColumn<SignalList>("output");
 
     // Insert
-    QTest::newRow("i(12-17)")
-            << (SignalList() << Insert(12, 17))
-            << (SignalList() << Insert(12, 17));
-    QTest::newRow("i(2-5),i(12-17)")
-            << (SignalList() << Insert(2, 5) << Insert(12, 17))
-            << (SignalList() << Insert(2, 5) << Insert(12, 17));
-    QTest::newRow("i(12-17),i(2-5)")
-            << (SignalList() << Insert(12, 17) << Insert(2, 5))
-            << (SignalList() << Insert(2, 5) << Insert(15, 20));
-    QTest::newRow("i(12-17),i(12-15)")
-            << (SignalList() << Insert(12, 17) << Insert(12, 15))
-            << (SignalList() << Insert(12, 20));
-    QTest::newRow("i(12-17),i(17-20)")
-            << (SignalList() << Insert(12, 17) << Insert(17, 20))
-            << (SignalList() << Insert(12, 20));
-    QTest::newRow("i(12-17),i(15-18)")
-            << (SignalList() << Insert(12, 17) << Insert(15, 18))
-            << (SignalList() << Insert(12, 20));
+    QTest::newRow("i(12,5)")
+            << (SignalList() << Insert(12,5))
+            << (SignalList() << Insert(12,5));
+    QTest::newRow("i(2,3),i(12,5)")
+            << (SignalList() << Insert(2,3) << Insert(12,5))
+            << (SignalList() << Insert(2,3) << Insert(12,5));
+    QTest::newRow("i(12,5),i(2,3)")
+            << (SignalList() << Insert(12,5) << Insert(2,3))
+            << (SignalList() << Insert(2,3) << Insert(15,5));
+    QTest::newRow("i(12,5),i(12,3)")
+            << (SignalList() << Insert(12,5) << Insert(12,3))
+            << (SignalList() << Insert(12,8));
+    QTest::newRow("i(12,5),i(17,3)")
+            << (SignalList() << Insert(12,5) << Insert(17,3))
+            << (SignalList() << Insert(12,8));
+    QTest::newRow("i(12,5),i(15,3)")
+            << (SignalList() << Insert(12,5) << Insert(15,3))
+            << (SignalList() << Insert(12,8));
 
     // Remove
-    QTest::newRow("r(3-12)")
-            << (SignalList() << Remove(3, 12))
-            << (SignalList() << Remove(3, 12));
-    QTest::newRow("r(3-7),r(3-5)")
-            << (SignalList() << Remove(3, 7) << Remove(3, 5))
-            << (SignalList() << Remove(3, 9));
-    QTest::newRow("r(4-3),r(14-19)")
-            << (SignalList() << Remove(4, 7) << Remove(14, 19))
-            << (SignalList() << Remove(4, 7) << Remove(14, 19));
-    QTest::newRow("r(14-19),r(4-7)")
-            << (SignalList() << Remove(14, 19) << Remove(4, 7))
-            << (SignalList() << Remove(4, 7) << Remove(11, 16));
-    QTest::newRow("r(4-7),r(2-11)")
-            << (SignalList() << Remove(4, 7) << Remove(2, 11))
-            << (SignalList() << Remove(2, 14));
+    QTest::newRow("r(3,9)")
+            << (SignalList() << Remove(3,9))
+            << (SignalList() << Remove(3,9));
+    QTest::newRow("r(3,4),r(3,2)")
+            << (SignalList() << Remove(3,4) << Remove(3,2))
+            << (SignalList() << Remove(3,6));
+    QTest::newRow("r(4,3),r(14,5)")
+            << (SignalList() << Remove(4,3) << Remove(14,5))
+            << (SignalList() << Remove(4,3) << Remove(14,5));
+    QTest::newRow("r(14,5),r(4,3)")
+            << (SignalList() << Remove(14,5) << Remove(4,3))
+            << (SignalList() << Remove(4,3) << Remove(11,5));
+    QTest::newRow("r(4,3),r(2,9)")
+            << (SignalList() << Remove(4,3) << Remove(2,9))
+            << (SignalList() << Remove(2,12));
 
     // Move
-    QTest::newRow("m(8-10,10)")
-            << (SignalList() << Move(8, 10, 10))
-            << (SignalList() << Move(8, 10, 10));
-    // No merging of moves yet.
-//    QTest::newRow("m(5-7,13),m(5-8,12)")
-//            << (SignalList() << Move(5, 7, 13) << Move(5, 8, 12))
-//            << (SignalList() << Move(5, 10, 10));
+    QTest::newRow("m(8-10,2)")
+            << (SignalList() << Move(8,10,2))
+            << (SignalList() << Remove(8,2,1) << Insert(10,2,1));
+
+    QTest::newRow("m(23-12,6),m(13-15,5)")
+            << (SignalList() << Move(23,12,6) << Move(13,15,5))
+            << (SignalList() << Remove(23,1,0) << Remove(23,5,1) << Insert(12,1,0) << Insert(15,5,1));
+    QTest::newRow("m(23-12,6),m(13-15,2)")
+            << (SignalList() << Move(23,12,6) << Move(13,20,2))
+            << (SignalList() << Remove(23,1,0) << Remove(23,2,1) << Remove(23,3,2) << Insert(12,1,0) << Insert(13,3,2) << Insert(20,2,1));
+    QTest::newRow("m(23-12,6),m(13-2,2)")
+            << (SignalList() << Move(23,12,6) << Move(13,2,2))
+            << (SignalList() << Remove(23,1,0) << Remove(23,2,1) << Remove(23,3,2) << Insert(2,2,1) << Insert(14,1,0) << Insert(15,3,2));
+    QTest::newRow("m(23-12,6),m(12-6,5)")
+            << (SignalList() << Move(23,12,6) << Move(12,6,5))
+            << (SignalList() << Remove(23,5,0) << Remove(23,1,1) << Insert(6,5,0) << Insert(17,1,1));
+    QTest::newRow("m(23-12,6),m(10-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(10,5,4))
+            << (SignalList() << Remove(10,2,0) << Remove(21,2,1) << Remove(21,4,2) << Insert(5,2,0) << Insert(7,2,1) << Insert(14,4,2));
+    QTest::newRow("m(23-12,6),m(16-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(16,5,4))
+            << (SignalList() << Remove(12,2,0) << Remove(21,4,1) << Remove(21,2,2) << Insert(5,2,2) << Insert(7,2,0) << Insert(16,4,1));
+    QTest::newRow("m(23-12,6),m(13-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(13,5,4))
+            << (SignalList() << Remove(23,1,0) << Remove(23,4,1) << Remove(23,1,2) << Insert(5,4,1) << Insert(16,1,0) << Insert(17,1,2));
+    QTest::newRow("m(23-12,6),m(14-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(14,5,4))
+            << (SignalList() << Remove(23,2,0) << Remove(23,4,1) << Insert(5,4,1) << Insert(16,2,0));
+    QTest::newRow("m(23-12,6),m(12-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(12,5,4))
+            << (SignalList() << Remove(23,4,0) << Remove(23,2,1) << Insert(5,4,0) << Insert(16,2,1));
+    QTest::newRow("m(23-12,6),m(11-5,8)")
+            << (SignalList() << Move(23,12,6) << Move(11,5,8))
+            << (SignalList() << Remove(11,1,0) << Remove(11,1,1) << Remove(21,6,2) << Insert(5,1,0) << Insert(6,6,2) << Insert(12,1,1));
+    QTest::newRow("m(23-12,6),m(8-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(8,5,4))
+            << (SignalList() << Remove(8,4,0) << Remove(19,6,1) << Insert(5,4,0) << Insert(12,6,1));
+    QTest::newRow("m(23-12,6),m(2-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(2,5,4))
+            << (SignalList() << Remove(2,4,0) << Remove(19,6,1) << Insert(5,4,0) << Insert(12,6,1));
+    QTest::newRow("m(23-12,6),m(18-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(18,5,4))
+            << (SignalList() << Remove(12,4,0) << Remove(19,6,1) << Insert(5,4,0) << Insert(16,6,1));
+    QTest::newRow("m(23-12,6),m(20-5,4)")
+            << (SignalList() << Move(23,12,6) << Move(20,5,4))
+            << (SignalList() << Remove(14,4,0) << Remove(19,6,1) << Insert(5,4,0) << Insert(16,6,1));
+
+    QTest::newRow("m(23-12,6),m(5-13,11)")
+            << (SignalList() << Move(23,12,6) << Move(5,13,11))
+            << (SignalList() << Remove(5,7,0) << Remove(16,4,1) << Remove(16,2,2) << Insert(5,2,2) << Insert(13,7,0) << Insert(20,4,1));
+
+    QTest::newRow("m(23-12,6),m(12-23,6)")
+            << (SignalList() << Move(23,12,6) << Move(12,23,6))
+            << (SignalList() << Remove(23,6,0) << Insert(23,6,0));  // ### These cancel out.
+    QTest::newRow("m(23-12,6),m(10-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(10,23,4))
+            << (SignalList() << Remove(10,2 ,0) << Remove(21,2,1) << Remove(21,4,2) << Insert(10,4,2) << Insert(23,2,0) << Insert(25,2,1));
+    QTest::newRow("m(23-12,6),m(16-23.4)")
+            << (SignalList() << Move(23,12,6) << Move(16,23,4))
+            << (SignalList() << Remove(12,2,0) << Remove(21,4,1) << Remove(21,2,2) << Insert(12,4,1) << Insert(23,2,2) << Insert(25,2,0));
+    QTest::newRow("m(23-12,6),m(13-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(13,23,4))
+            << (SignalList() << Remove(23,1,0) << Remove(23,4,1) << Remove(23,1,2) << Insert(12,1,0) << Insert(13,1,2) << Insert(23,4,1));
+    QTest::newRow("m(23-12,6),m(14-23,)")
+            << (SignalList() << Move(23,12,6) << Move(14,23,4))
+            << (SignalList() << Remove(23,2,0) << Remove(23,4,1) << Insert(12,2,0) << Insert(23,4,1));
+    QTest::newRow("m(23-12,6),m(12-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(12,23,4))
+            << (SignalList() << Remove(23,4,0) << Remove(23,2,1) << Insert(12,2,1) << Insert(23,4,0));
+    QTest::newRow("m(23-12,6),m(11-23,8)")
+            << (SignalList() << Move(23,12,6) << Move(11,23,8))
+            << (SignalList() << Remove(11,1,0) << Remove(11,1,1) << Remove(21,6,2) << Insert(23,1,0) << Insert(24,6,2) << Insert(30,1,1));
+    QTest::newRow("m(23-12,6),m(8-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(8,23,4))
+            << (SignalList() << Remove(8,4,0) << Remove(19,6,1) << Insert(8,6,1) << Insert(23,4,0));
+    QTest::newRow("m(23-12,6),m(2-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(2,23,4))
+            << (SignalList() << Remove(2,4,0) << Remove(19,6,1) << Insert(8,6,1) << Insert(23,4,0));
+    QTest::newRow("m(23-12,6),m(18-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(18,23,4))
+            << (SignalList() << Remove(12,4,0) << Remove(19,6,1) << Insert(12,6,1) << Insert(23,4,0));
+    QTest::newRow("m(23-12,6),m(20-23,4)")
+            << (SignalList() << Move(23,12,6) << Move(20,23,4))
+            << (SignalList() << Remove(14,4,1) << Remove(19,6,0) << Insert(12,6,0) << Insert(23,4,1));
+
+    QTest::newRow("m(23-12,6),m(11-23,10)")
+            << (SignalList() << Move(23,12,6) << Move(11,23,10))
+            << (SignalList() << Remove(11,1,3) << Remove(11,3,1) << Remove(19,6,2) << Insert(23,1,3) << Insert(24,6,2) << Insert(30,3,1));
+
+    QTest::newRow("m(3-9,12),m(13-5,12)")
+            << (SignalList() << Move(3,9,12) << Move(13,15,5))
+            << (SignalList() << Remove(3,4,2) << Remove(3,5,1) << Remove(3,2,0) << Remove(3,1,3) << Insert(9,4,2) << Insert(13,2,0) << Insert(15,5,1) << Insert(20,1,3));
+    QTest::newRow("m(3-9,12),m(13-15,20)")
+            << (SignalList() << Move(3,9,12) << Move(13,15,20))
+            << (SignalList() << Remove(3,4,0) << Remove(3,8,1) << Remove(9,12,2) << Insert(9,4,0) << Insert(15,8,1) << Insert(23,12,2));
+    QTest::newRow("m(3-9,12),m(13-15,2)")
+            << (SignalList() << Move(3,9,12) << Move(13,15,2))
+            << (SignalList() << Remove(3,4,2) << Remove(3,2,1) << Remove(3,2,0) << Remove(3,4,3) << Insert(9,4,2) << Insert(13,2,0) << Insert(15,2,1) << Insert(17,4,3));
+    QTest::newRow("m(3-9,12),m(12-5,6)")
+            << (SignalList() << Move(3,9,12) << Move(12,5,6))
+            << (SignalList() << Remove(3,3,0) << Remove(3,6,1) << Remove(3,3,2) << Insert(5,6,1) << Insert(15,3,0) << Insert(18,3,2));
+    QTest::newRow("m(3-9,12),m(10-14,5)")
+            << (SignalList() << Move(3,9,12) << Move(10,14,5))
+            << (SignalList() << Remove(3,1,2) << Remove(3,5,1) << Remove(3,4,0) << Remove(3,2,3) << Insert(9,1,2) << Insert(10,4,0) << Insert(14,5,1) << Insert(19,2,3));
+    QTest::newRow("m(3-9,12),m(16-20,5)")
+            << (SignalList() << Move(3,9,12) << Move(16,20,5))
+            << (SignalList() << Remove(3,7,0) << Remove(3,5,1) << Insert(9,7,0) << Insert(20,5,1));
+    QTest::newRow("m(3-9,12),m(13-17,5)")
+            << (SignalList() << Move(3,9,12) << Move(13,17,5))
+            << (SignalList() << Remove(3,4,0) << Remove(3,5,1) << Remove(3,3,2) << Insert(9,4,0) << Insert(13,3,2) << Insert(17,5,1));
+    QTest::newRow("m(3-9,12),m(14-18,5)")
+            << (SignalList() << Move(3,9,12) << Move(14,18,5))
+            << (SignalList() << Remove(3,5,0) << Remove(3,5,1) << Remove(3,2,2) << Insert(9,5,0) << Insert(14,2,2) << Insert(18,5,1));
+    QTest::newRow("m(3-9,12),m(12-16,5)")
+            << (SignalList() << Move(3,9,12) << Move(12,16,5))
+            << (SignalList() << Remove(3,3,2) << Remove(3,5,1) << Remove(3,4,0) << Insert(9,3,2) << Insert(12,4,0) << Insert(16,5,1));
+    QTest::newRow("m(3-9,12),m(11-19,5)")
+            << (SignalList() << Move(3,9,12) << Move(11,19,5))
+            << (SignalList() << Remove(3,2,0) << Remove(3,5,1) << Remove(3,5,2) << Insert(9,2,0) << Insert(11,5,2) << Insert(19,5,1));
+    QTest::newRow("m(3-9,12),m(8-12,5)")
+            << (SignalList() << Move(3,9,12) << Move(8,12,5))
+            << (SignalList() << Remove(3,4,1) << Remove(3,4,0) << Remove(3,4,4) << Remove(8,1,2) << Insert(8,4,0) << Insert(12,1,2) << Insert(13,4,1) << Insert(17,4,4));
+    QTest::newRow("m(3-9,12),m(2-6,5)")
+            << (SignalList() << Move(3,9,12) << Move(2,6,5))
+            << (SignalList() <<  Remove(2,1,2) << Remove(2,2,0) << Remove(2,10,3) << Remove(2,4,1) << Insert(4,2,0) << Insert(6,1,2) << Insert(7,4,1) << Insert(11,10,3));
+    QTest::newRow("m(3-9,12),m(18-22,5)")
+            << (SignalList() << Move(3,9,12) << Move(18,22,5))
+            << (SignalList() << Remove(3,9,0) << Remove(3,3,1) << Remove(9,2,2) << Insert(9,9,0) << Insert(22,3,1) << Insert(25,2,2));
+    QTest::newRow("m(3-9,12),m(20-24,5)")
+            << (SignalList() << Move(3,9,12) << Move(20,24,5))
+            << (SignalList() << Remove(3,11,0) << Remove(3,1,1) << Remove(9,4,2) << Insert(9,11,0) << Insert(24,1,1) << Insert(25,4,2));
+
+    QTest::newRow("m(3-9,12),m(5-11,8)")
+            << (SignalList() << Move(3,9,12) << Move(5,11,8))
+            << (SignalList() << Remove(3,4,1) << Remove(3,6,0) << Remove(3,2,3) << Remove(5,4,2) << Insert(5,6,0) << Insert(11,4,2) << Insert(15,2,3) << Insert(15,4,1));
+
+    QTest::newRow("m(3-9,12),m(12-23,6)")
+            << (SignalList() << Move(3,9,12) << Move(12,23,6))
+            << (SignalList() << Remove(3,3,2) << Remove(3,6,1) << Remove(3,3,0) << Insert(9,3,2) << Insert(12,3,0) << Insert(23,6,1));
+    QTest::newRow("m(3-9,12),m(10-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(10,23,4))
+            << (SignalList() << Remove(3,1,2) << Remove(3,4,1) << Remove(3,7,0) << Insert(9,1,2) << Insert(10,7,0) << Insert(23,4,1));
+    QTest::newRow("m(3-9,12),m(16-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(16,23,4))
+            << (SignalList() << Remove(3,7,2) << Remove(3,4,1) << Remove(3,1,0) << Insert(9,7,2) << Insert(16,1,0) << Insert(23,4,1));
+    QTest::newRow("m(3-9,12),m(13-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(13,23,4))
+            << (SignalList() << Remove(3,4,2) << Remove(3,4,1) << Remove(3,4,0) << Insert(9,4,2) << Insert(13,4,0) << Insert(23,4,1));
+    QTest::newRow("m(3-9,12),m(14-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(14,23,4))
+            << (SignalList() << Remove(3,5,2) << Remove(3,4,1) << Remove(3,3,0) << Insert(9,5,2) << Insert(14,3,0) << Insert(23,4,1));
+    QTest::newRow("m(3-9,12),m(12-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(12,23,4))
+            << (SignalList() << Remove(3,3,2) << Remove(3,4,1) << Remove(3,5,0) << Insert(9,3,2) << Insert(12,5,0) << Insert(23,4,1));
+    QTest::newRow("m(3-9,12),m(11-23,8)")
+            << (SignalList() << Move(3,9,12) << Move(11,23,8))
+            << (SignalList() << Remove(3,2,2) << Remove(3,8,1) << Remove(3,2,0) << Insert(9,2,2) << Insert(11,2,0) << Insert(23,8,1));
+    QTest::newRow("m(3-9,12),m(8-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(8,23,4))
+            << (SignalList() << Remove(3,3,1) << Remove(3,9,0) << Remove(8,1,2) << Insert(8,9,0) << Insert(23,1,2) << Insert(24,3,1));
+    QTest::newRow("m(3-9,12),m(2-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(2,23,4))
+            << (SignalList() << Remove(2,1,2) << Remove(2,12,0) << Remove(2,3,1) << Insert(5,12,0) << Insert(23,1,2) << Insert(24,3,1));
+    QTest::newRow("m(3-9,12),m(18-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(18,23,4))
+            << (SignalList() << Remove(3,9,3) << Remove(3,3,2) << Remove(9,1,1) << Insert(9,9,3) << Insert(23,3,2) << Insert(26,1,1));
+    QTest::newRow("m(3-9,12),m(20-23,4)")
+            << (SignalList() << Move(3,9,12) << Move(20,23,4))
+            << (SignalList() << Remove(3,11,3) << Remove(3,1,2) << Remove(9,3,1) << Insert(9,11,3) << Insert(23,1,2) << Insert(24,3,1));
+
+    QTest::newRow("m(3-9,12),m(11-23,10)")
+            << (SignalList() << Move(3,9,12) << Move(11,23,10))
+            << (SignalList() << Remove(3,2,2) << Remove(3,10,1) << Insert(9,2,2) << Insert(23,10,1));
 
     // Change
-    QTest::newRow("c(4-9)")
-            << (SignalList() << Change(4, 9))
-            << (SignalList() << Change(4, 9));
-    QTest::newRow("c(4-9),c(12-14)")
-            << (SignalList() << Change(4, 9) << Change(12, 14))
-            << (SignalList() << Change(4, 9) << Change(12, 14));
-    QTest::newRow("c(12-14),c(4-9)")
-            << (SignalList() << Change(12, 14) << Change(4, 9))
-            << (SignalList() << Change(4, 9) << Change(12, 14));
-    QTest::newRow("c(4-9),c(2-4)")
-            << (SignalList() << Change(4, 9) << Change(2, 4))
-            << (SignalList() << Change(2, 9));
-    QTest::newRow("c(4-9),c(9-11)")
-            << (SignalList() << Change(4, 9) << Change(9, 11))
-            << (SignalList() << Change(4, 11));
-    QTest::newRow("c(4-9),c(3-5)")
-            << (SignalList() << Change(4, 9) << Change(3, 5))
-            << (SignalList() << Change(3, 9));
-    QTest::newRow("c(4-9),c(8-10)")
-            << (SignalList() << Change(4, 9) << Change(8, 10))
-            << (SignalList() << Change(4, 10));
-    QTest::newRow("c(4-9),c(3-5)")
-            << (SignalList() << Change(4, 9) << Change(3, 5))
-            << (SignalList() << Change(3, 9));
-    QTest::newRow("c(4-9),c(2,11)")
-            << (SignalList() << Change(4, 9) << Change(2, 11))
-            << (SignalList() << Change(2, 11));
-    QTest::newRow("c(4-9),c(12-15),c(8-14)")
-            << (SignalList() << Change(4, 9) << Change(12, 15) << Change(8, 14))
-            << (SignalList() << Change(4, 15));
-
-    // Insert, then remove.
-    QTest::newRow("i(12-18),r(12-18)")
-            << (SignalList() << Insert(12, 18) << Remove(12, 18))
+    QTest::newRow("c(4,5)")
+            << (SignalList() << Change(4,5))
+            << (SignalList() << Change(4,5));
+    QTest::newRow("c(4,5),c(12,2)")
+            << (SignalList() << Change(4,5) << Change(12,2))
+            << (SignalList() << Change(4,5) << Change(12,2));
+    QTest::newRow("c(12,2),c(4,5)")
+            << (SignalList() << Change(12,2) << Change(4,5))
+            << (SignalList() << Change(4,5) << Change(12,2));
+    QTest::newRow("c(4,5),c(2,2)")
+            << (SignalList() << Change(4,5) << Change(2,2))
+            << (SignalList() << Change(2,7));
+    QTest::newRow("c(4,5),c(9,2)")
+            << (SignalList() << Change(4,5) << Change(9,2))
+            << (SignalList() << Change(4,7));
+    QTest::newRow("c(4,5),c(3,2)")
+            << (SignalList() << Change(4,5) << Change(3,2))
+            << (SignalList() << Change(3,6));
+    QTest::newRow("c(4,5),c(8,2)")
+            << (SignalList() << Change(4,5) << Change(8,2))
+            << (SignalList() << Change(4,6));
+    QTest::newRow("c(4,5),c(3,2)")
+            << (SignalList() << Change(4,5) << Change(3,2))
+            << (SignalList() << Change(3,6));
+    QTest::newRow("c(4,5),c(2,9)")
+            << (SignalList() << Change(4,5) << Change(2,9))
+            << (SignalList() << Change(2,9));
+    QTest::newRow("c(4,5),c(12,3),c(8,6)")
+            << (SignalList() << Change(4,5) << Change(12,3) << Change(8,6))
+            << (SignalList() << Change(4,11));
+
+    // Insert,then remove.
+    QTest::newRow("i(12,6),r(12,6)")
+            << (SignalList() << Insert(12,6) << Remove(12,6))
             << (SignalList());
-    QTest::newRow("i(12-18),r(10-14)")
-            << (SignalList() << Insert(12, 18) << Remove(10, 14))
-            << (SignalList() << Remove(10, 12) << Insert(10, 14));
-    QTest::newRow("i(12-18),r(16-20)")
-            << (SignalList() << Insert(12, 18) << Remove(16, 20))
-            << (SignalList() << Remove(12, 14) << Insert(12, 16));
-    QTest::newRow("i(12-18),r(13-17)")
-            << (SignalList() << Insert(12, 18) << Remove(13, 17))
-            << (SignalList() << Insert(12, 14));
-    QTest::newRow("i(12-18),r(14,18)")
-            << (SignalList() << Insert(12, 18) << Remove(14, 18))
-            << (SignalList() << Insert(12, 14));
-    QTest::newRow("i(12-18),r(12-16)")
-            << (SignalList() << Insert(12, 18) << Remove(12, 16))
-            << (SignalList() << Insert(12, 14));
-    QTest::newRow("i(12-18),r(11-19)")
-            << (SignalList() << Insert(12, 18) << Remove(11, 19))
-            << (SignalList() << Remove(11, 13));
-    QTest::newRow("i(12-18),r(8-12)")
-            << (SignalList() << Insert(12, 18) << Remove(8, 12))
-            << (SignalList() << Remove(8, 12) << Insert(8, 14));
-    QTest::newRow("i(12-18),r(2-6)")
-            << (SignalList() << Insert(12, 18) << Remove(2, 6))
-            << (SignalList() << Remove(2, 6) << Insert(8, 14));
-    QTest::newRow("i(12-18),r(18-22)")
-            << (SignalList() << Insert(12, 18) << Remove(18, 22))
-            << (SignalList() << Remove(12, 16) << Insert(12, 18));
-    QTest::newRow("i(12-18),r(20-24)")
-            << (SignalList() << Insert(12, 18) << Remove(20, 24))
-            << (SignalList() << Remove(14, 18) << Insert(12, 18));
-
-    // Insert, then move
-    QTest::newRow("i(12-18),m(12-18,5)")
-            << (SignalList() << Insert(12, 18) << Move(12, 18, 5))
-            << (SignalList() << Insert(5, 11));
-    QTest::newRow("i(12-18),m(10-14,5)")
-            << (SignalList() << Insert(12, 18) << Move(10, 14, 5))
-            << (SignalList() << Insert(5, 7) << Insert(14, 18) << Move(12, 14, 5));
-    QTest::newRow("i(12-18),m(16-20,5)")
-            << (SignalList() << Insert(12, 18) << Move(16, 20, 5))
-            << (SignalList() << Insert(5, 7) << Insert(14, 18) << Move(18, 20, 7));
-    QTest::newRow("i(12-18),m(13-17,5)")
-            << (SignalList() << Insert(12, 18) << Move(13, 17, 5))
-            << (SignalList() << Insert(5, 9) << Insert(16, 18));
-    QTest::newRow("i(12-18),m(14-18,5)")
-            << (SignalList() << Insert(12, 18) << Move(14, 18, 5))
-            << (SignalList() << Insert(5, 9) << Insert(16, 18));
-    QTest::newRow("i(12-18),m(12-16,5)")
-            << (SignalList() << Insert(12, 18) << Move(12, 16, 5))
-            << (SignalList() << Insert(5, 9) << Insert(16, 18));
-    QTest::newRow("i(12-18),m(11-19,5)")
-            << (SignalList() << Insert(12, 18) << Move(11, 19, 5))
-            << (SignalList() << Insert(5, 11) << Move(17, 18, 5) << Move(18, 19, 12));
-    QTest::newRow("i(12-18),m(8-12,5)")
-            << (SignalList() << Insert(12, 18) << Move(8, 12, 5))
-            << (SignalList() << Insert(12, 18) << Move(8, 12, 5));
-    QTest::newRow("i(12-18),m(2-6,5)")
-            << (SignalList() << Insert(12, 18) << Move(2, 6, 5))
-            << (SignalList() << Insert(12, 18) << Move(2, 6, 5));
-    QTest::newRow("i(12-18),m(18-22,5)")
-            << (SignalList() << Insert(12, 18) << Move(18, 22, 5))
-            << (SignalList() << Insert(12, 18) << Move(18, 22, 5));
-    QTest::newRow("i(12-18),m(20-24,5)")
-            << (SignalList() << Insert(12, 18) << Move(20, 24, 5))
-            << (SignalList() << Insert(12, 18) << Move(20, 24, 5));
-
-    QTest::newRow("i(12-18),m(5-13,11)")
-            << (SignalList() << Insert(12, 18) << Move(5, 13, 11))
-            << (SignalList() << Insert(12, 17) << Insert(18, 19) << Move(5, 12, 11));
-
-    QTest::newRow("i(12-18),m(12-18,23)")
-            << (SignalList() << Insert(12, 18) << Move(12, 18, 23))
-            << (SignalList() << Insert(23, 29));
-    QTest::newRow("i(12-18),m(10-14,23)")
-            << (SignalList() << Insert(12, 18) << Move(10, 14, 23))
-            << (SignalList() << Insert(12, 16) << Insert(25, 27) << Move(10, 12, 23));
-    QTest::newRow("i(12-18),m(16-20,23)")
-            << (SignalList() << Insert(12, 18) << Move(16, 20, 23))
-            << (SignalList() << Insert(12, 16) << Insert(25, 27) << Move(16, 18, 25));
-    QTest::newRow("i(12-18),m(13-17,23)")
-            << (SignalList() << Insert(12, 18) << Move(13, 17, 23))
-            << (SignalList() << Insert(12, 14) << Insert(23, 27));
-    QTest::newRow("i(12-18),m(14-18,23)")
-            << (SignalList() << Insert(12, 18) << Move(14, 18, 23))
-            << (SignalList() << Insert(12, 14) << Insert(23, 27));
-    QTest::newRow("i(12-18),m(12-16,23)")
-            << (SignalList() << Insert(12, 18) << Move(12, 16, 23))
-            << (SignalList() << Insert(12, 14) << Insert(23, 27));
-    QTest::newRow("i(12-18),m(11-19,23)")
-            << (SignalList() << Insert(12, 18) << Move(11, 19, 23))
-            << (SignalList() << Insert(25, 31) << Move(11, 12, 24) << Move(11, 12, 30));
-    QTest::newRow("i(12-18),m(8-12,23)")
-            << (SignalList() << Insert(12, 18) << Move(8, 12, 23))
-            << (SignalList() << Insert(12, 18) << Move(8, 12, 23));
-    QTest::newRow("i(12-18),m(2-6,23)")
-            << (SignalList() << Insert(12, 18) << Move(2, 6, 23))
-            << (SignalList() << Insert(12, 18) << Move(2, 6, 23));
-    QTest::newRow("i(12-18),m(18-22,23)")
-            << (SignalList() << Insert(12, 18) << Move(18, 22, 23))
-            << (SignalList() << Insert(12, 18) << Move(18, 22, 23));
-    QTest::newRow("i(12-18),m(20-24,23)")
-            << (SignalList() << Insert(12, 18) << Move(20, 24, 23))
-            << (SignalList() << Insert(12, 18) << Move(20, 24, 23));
-
-    QTest::newRow("i(12-18),m(11-21,23)")
-            << (SignalList() << Insert(12, 18) << Move(11, 21, 23))
-            << (SignalList() << Insert(27, 33) << Move(11, 12, 26) << Move(11, 14, 30));
-
-    // Insert, then change
-    QTest::newRow("i(12-18),c(12-16)")
-            << (SignalList() << Insert(12, 18) << Change(12, 6))
-            << (SignalList() << Insert(12, 18));
-    QTest::newRow("i(12-18),c(10-14)")
-            << (SignalList() << Insert(12, 18) << Change(10, 16))
-            << (SignalList() << Insert(12, 18) << Change(10, 12));
-    QTest::newRow("i(12-18),c(16-20)")
-            << (SignalList() << Insert(12, 18) << Change(16, 20))
-            << (SignalList() << Insert(12, 18) << Change(18, 20));
-    QTest::newRow("i(12-18),c(13-17)")
-            << (SignalList() << Insert(12, 18) << Change(13, 17))
-            << (SignalList() << Insert(12, 18));
-    QTest::newRow("i(12-18),c(14-18)")
-            << (SignalList() << Insert(12, 18) << Change(14, 18))
-            << (SignalList() << Insert(12, 18));
-    QTest::newRow("i(12-18),c(12-16)")
-            << (SignalList() << Insert(12, 18) << Change(12, 16))
-            << (SignalList() << Insert(12, 18));
-    QTest::newRow("i(12-18),c(11-19)")
-            << (SignalList() << Insert(12, 18) << Change(11, 19))
-            << (SignalList() << Insert(12, 18) << Change(11, 12) << Change(18, 19));
-    QTest::newRow("i(12-18),c(8-12)")
-            << (SignalList() << Insert(12, 18) << Change(8, 12))
-            << (SignalList() << Insert(12, 18) << Change(8, 12));
-    QTest::newRow("i(12-18),c(2-6)")
-            << (SignalList() << Insert(12, 18) << Change(2, 6))
-            << (SignalList() << Insert(12, 18) << Change(2, 6));
-    QTest::newRow("i(12-18),c(18-22)")
-            << (SignalList() << Insert(12, 18) << Change(18, 22))
-            << (SignalList() << Insert(12, 18) << Change(18, 22));
-    QTest::newRow("i(12-18),c(20-24)")
-            << (SignalList() << Insert(12, 18) << Change(20, 24))
-            << (SignalList() << Insert(12, 18) << Change(20, 24));
-
-    // Remove, then insert
-    QTest::newRow("r(12-18),i(12-18)")
-            << (SignalList() << Remove(12, 18) << Insert(12, 18))
-            << (SignalList() << Remove(12, 18) << Insert(12, 18));
-    QTest::newRow("r(12-18),i(10-14)")
-            << (SignalList() << Remove(12, 18) << Insert(10, 14))
-            << (SignalList() << Remove(12, 18) << Insert(10, 14));
-    QTest::newRow("r(12-18),i(16-20)")
-            << (SignalList() << Remove(12, 18) << Insert(16, 20))
-            << (SignalList() << Remove(12, 18) << Insert(16, 20));
-    QTest::newRow("r(12-18),i(13-17)")
-            << (SignalList() << Remove(12, 18) << Insert(13, 17))
-            << (SignalList() << Remove(12, 18) << Insert(13, 17));
-    QTest::newRow("r(12-18),i(14-18)")
-            << (SignalList() << Remove(12, 18) << Insert(14, 18))
-            << (SignalList() << Remove(12, 18) << Insert(14, 18));
-    QTest::newRow("r(12-18),i(12-16)")
-            << (SignalList() << Remove(12, 18) << Insert(12, 16))
-            << (SignalList() << Remove(12, 18) << Insert(12, 16));
-    QTest::newRow("r(12-18),i(11-19)")
-            << (SignalList() << Remove(12, 18) << Insert(11, 19))
-            << (SignalList() << Remove(12, 18) << Insert(11, 19));
-    QTest::newRow("i(12-18),r(8-12)")
-            << (SignalList() << Remove(12, 18) << Insert(8, 12))
-            << (SignalList() << Remove(12, 18) << Insert(8, 12));
-    QTest::newRow("i(12-18),r(2-6)")
-            << (SignalList() << Remove(12, 18) << Insert(2, 6))
-            << (SignalList() << Remove(12, 18) << Insert(2, 6));
-    QTest::newRow("i(12-18),r(18-22)")
-            << (SignalList() << Remove(12, 18) << Insert(18, 22))
-            << (SignalList() << Remove(12, 18) << Insert(18, 22));
-    QTest::newRow("i(12-18),r(20-24)")
-            << (SignalList() << Remove(12, 18) << Insert(20, 24))
-            << (SignalList() << Remove(12, 18) << Insert(20, 24));
-
-    // Move, then insert
-    QTest::newRow("m(12-18,5),i(12-18)")
-            << (SignalList() << Move(12, 18, 5) << Insert(12, 18))
-            << (SignalList() << Insert(6, 12) << Move(18, 24, 5));
-    QTest::newRow("m(12-18,5),i(10-14)")
-            << (SignalList() << Move(12, 18, 5) << Insert(10, 14))
-            << (SignalList() << Insert(5, 9) << Move(16, 21, 5) << Move(21, 22, 14));
-    QTest::newRow("m(12-18,5),i(16-20)")
-            << (SignalList() << Move(12, 18, 5) << Insert(16, 20))
-            << (SignalList() << Insert(10, 14) << Move(16, 22, 5));
-    QTest::newRow("m(12-18,5),i(13-17)")
-            << (SignalList() << Move(12, 18, 5) << Insert(13, 17))
-            << (SignalList() << Insert(7, 11) << Move(16, 22, 5));
-    QTest::newRow("m(12-18,5),i(14-18)")
-            << (SignalList() << Move(12, 18, 5) << Insert(14, 18))
-            << (SignalList() << Insert(8, 12) << Move(16, 22, 5));
-    QTest::newRow("m(12-18,5),i(12-16)")
-            << (SignalList() << Move(12, 18, 5) << Insert(12, 16))
-            << (SignalList() << Insert(6, 10) << Move(16, 22, 5));
-    QTest::newRow("m(12-18,5),i(11-19)")
-            << (SignalList() << Move(12, 18, 5) << Insert(11, 19))
-            << (SignalList() << Insert(5, 13) << Move(20, 26, 5));
-    QTest::newRow("m(12-18,5),i(8-12)")
-            << (SignalList() << Move(12, 18, 5) << Insert(8, 12))
-            << (SignalList() << Insert(5, 9) << Move(16, 19, 5) << Move(19, 22, 12));
-    QTest::newRow("m(12-18,5),i(2-6)")
-            << (SignalList() << Move(12, 18, 5) << Insert(2, 6))
-            << (SignalList() << Insert(2, 6) << Move(16, 22, 9));
-    QTest::newRow("m(12-18,5),i(18-22)")
-            << (SignalList() << Move(12, 18, 5) << Insert(18, 22))
-            << (SignalList() << Insert(18, 22) << Move(12, 18, 5));
-    QTest::newRow("m(12-18,5),i(20-24)")
-            << (SignalList() << Move(12, 18, 5) << Insert(20, 24))
-            << (SignalList() << Insert(20, 24) << Move(12, 18, 5));
-
-    QTest::newRow("m(12-18,23),i(12-18)")
-            << (SignalList() << Move(12, 18, 23) << Insert(12, 18))
-            << (SignalList() << Insert(12, 18) << Move(18, 24, 29));
-    QTest::newRow("m(12-18,23),i(10-14)")
-            << (SignalList() << Move(12, 18, 23) << Insert(10, 14))
-            << (SignalList() << Insert(10, 14) << Move(16, 22, 27));
-    QTest::newRow("m(12-18,23),i(16-20)")
-            << (SignalList() << Move(12, 18, 23) << Insert(16, 20))
-            << (SignalList() << Insert(22, 26) << Move(12, 18, 27));
-    QTest::newRow("m(12-18,23),i(13-17)")
-            << (SignalList() << Move(12, 18, 23) << Insert(13, 17))
-            << (SignalList() << Insert(19, 23) << Move(12, 18, 27));
-    QTest::newRow("m(12-18,23),i(14-18)")
-            << (SignalList() << Move(12, 18, 23) << Insert(14, 18))
-            << (SignalList() << Insert(20, 24) << Move(12, 18, 27));
-    QTest::newRow("m(12-18,23),i(12-16)")
-            << (SignalList() << Move(12, 18, 23) << Insert(12, 16))
-            << (SignalList() << Insert(12, 16) << Move(16, 22, 27));
-    QTest::newRow("m(12-18,23),i(11-19)")
-            << (SignalList() << Move(12, 18, 23) << Insert(11, 19))
-            << (SignalList() << Insert(11, 19) << Move(20, 26, 31));
-    QTest::newRow("m(12-18,23),i(8-12)")
-            << (SignalList() << Move(12, 18, 23) << Insert(8, 12))
-            << (SignalList() << Insert(8, 12) << Move(16, 22, 27));
-    QTest::newRow("m(12-18,23),i(2-6)")
-            << (SignalList() << Move(12, 18, 23) << Insert(2, 6))
-            << (SignalList() << Insert(2, 6) << Move(16, 22, 27));
-    QTest::newRow("m(12-18,23),i(18-22)")
-            << (SignalList() << Move(12, 18, 23) << Insert(18, 22))
-            << (SignalList() << Insert(24, 28) << Move(12, 18, 27));
-    QTest::newRow("m(12-18,23),i(20-24)")
-            << (SignalList() << Move(12, 18, 23) << Insert(20, 24))
-            << (SignalList() << Insert(26, 30) << Move(12, 18, 27));
-
-    // Move, then remove
-    QTest::newRow("m(12-18,5),r(12-18)")
-            << (SignalList() << Move(12, 18, 5) << Remove(12, 18))
-            << (SignalList() << Remove(6, 12) << Move(6, 12, 5));
-    QTest::newRow("m(12-18,5),r(10-14)")
-            << (SignalList() << Move(12, 18, 5) << Remove(10, 14))
-            << (SignalList() << Remove(5, 8) << Remove(14, 15) << Move(9, 14, 5));
-    QTest::newRow("m(12-18,5),r(16-20)")
-            << (SignalList() << Move(12, 18, 5) << Remove(16, 20))
-            << (SignalList() << Remove(10, 12) << Remove(16, 18) << Move(10, 16, 5));
-    QTest::newRow("m(12-18,5),r(13-17)")
-            << (SignalList() << Move(12, 18, 5) << Remove(13, 17))
-            << (SignalList() << Remove(7, 11) << Move(8, 14, 5));
-    QTest::newRow("m(12-18,5),r(14-18)")
-            << (SignalList() << Move(12, 18, 5) << Remove(14, 18))
-            << (SignalList() << Remove(8, 12) << Move(8, 14, 5));
-    QTest::newRow("m(12-18,5),r(12-16)")
-            << (SignalList() << Move(12, 18, 5) << Remove(12, 16))
-            << (SignalList() << Remove(6, 10) << Move(8, 14, 5));
-    QTest::newRow("m(12-18,5),r(11-19)")
-            << (SignalList() << Move(12, 18, 5) << Remove(11, 19))
-            << (SignalList() << Remove(5, 12) << Remove(11, 12));
-    QTest::newRow("m(12-18,5),r(8-12)")
-            << (SignalList() << Move(12, 18, 5) << Remove(8, 12))
-            << (SignalList() << Remove(5, 6) << Remove(14, 17) << Move(11, 14, 5));
-    QTest::newRow("m(12-18,5),r(2-6)")
-            << (SignalList() << Move(12, 18, 5) << Remove(2, 6))
-            << (SignalList() << Remove(2, 5) << Remove(9, 10) << Move(9, 14, 2));
-    QTest::newRow("m(12-18,5),r(6-10)")
-            << (SignalList() << Move(12, 18, 5) << Remove(6, 10))
-            << (SignalList() << Remove(13, 17) << Move(12, 14, 5));
-    QTest::newRow("m(12-18,5),r(18-22)")
-            << (SignalList() << Move(12, 18, 5) << Remove(18, 22))
-            << (SignalList() << Remove(18, 22) << Move(12, 18, 5));
-    QTest::newRow("m(12-18,5),r(20-24)")
-            << (SignalList() << Move(12, 18, 5) << Remove(20, 24))
-            << (SignalList() << Remove(20, 24) << Move(12, 18, 5));
-
-    QTest::newRow("m(12-18,23),r(12-18)")
-            << (SignalList() << Move(12, 18, 23) << Remove(12, 18))
-            << (SignalList() << Remove(18, 24) << Move(12, 18, 17));
-    QTest::newRow("m(12-18,23),r(10-14)")
-            << (SignalList() << Move(12, 18, 23) << Remove(10, 14))
-            << (SignalList() << Remove(10, 12) << Remove(16, 18) << Move(10, 16, 19));
-    QTest::newRow("m(12-18,23),r(16-20)")
-            << (SignalList() << Move(12, 18, 23) << Remove(16, 20))
-            << (SignalList() << Remove(22, 26) << Move(12, 18, 19));
-    QTest::newRow("m(12-18,23),r(13-17)")
-            << (SignalList() << Move(12, 18, 23) << Remove(13, 17))
-            << (SignalList() << Remove(19, 23) << Move(12, 18, 19));
-    QTest::newRow("m(12-18,23),r(14-18)")
-            << (SignalList() << Move(12, 18, 23) << Remove(14, 18))
-            << (SignalList() << Remove(20, 24) << Move(12, 18, 19));
-    QTest::newRow("m(12-18,23),r(12-16)")
-            << (SignalList() << Move(12, 18, 23) << Remove(12, 16))
-            << (SignalList() << Remove(18, 22) << Move(12, 18, 19));
-    QTest::newRow("m(12-18,23),r(11-19)")
-            << (SignalList() << Move(12, 18, 23) << Remove(11, 19))
-            << (SignalList() << Remove(11, 12) << Remove(17, 24) << Move(11, 17, 15));
-    QTest::newRow("m(12-18,23),r(8-12)")
-            << (SignalList() << Move(12, 18, 23) << Remove(8, 12))
-            << (SignalList() << Remove(8, 12) << Move(8, 14, 19));
-    QTest::newRow("m(12-18,23),r(2-6)")
-            << (SignalList() << Move(12, 18, 23) << Remove(2, 6))
-            << (SignalList() << Remove(2, 6) << Move(8, 14, 19));
-    QTest::newRow("m(12-18,23),r(18-22)")
-            << (SignalList() << Move(12, 18, 23) << Remove(18, 22))
-            << (SignalList() << Remove(24, 28) << Move(12, 18, 19));
-    QTest::newRow("m(12-18,23),r(20-24)")
-            << (SignalList() << Move(12, 18, 23) << Remove(20, 24))
-            << (SignalList() << Remove(12, 13) << Remove(25, 28) << Move(12, 17, 20));
+    QTest::newRow("i(12,6),r(10,4)")
+            << (SignalList() << Insert(12,6) << Remove(10,4))
+            << (SignalList() << Remove(10,2) << Insert(10,4));
+    QTest::newRow("i(12,6),r(16,4)")
+            << (SignalList() << Insert(12,6) << Remove(16,4))
+            << (SignalList() << Remove(12,2) << Insert(12,4));
+    QTest::newRow("i(12,6),r(13,4)")
+            << (SignalList() << Insert(12,6) << Remove(13,4))
+            << (SignalList() << Insert(12,2));
+    QTest::newRow("i(12,6),r(14,4)")
+            << (SignalList() << Insert(12,6) << Remove(14,4))
+            << (SignalList() << Insert(12,2));
+    QTest::newRow("i(12,6),r(12,4)")
+            << (SignalList() << Insert(12,6) << Remove(12,4))
+            << (SignalList() << Insert(12,2));
+    QTest::newRow("i(12,6),r(11,8)")
+            << (SignalList() << Insert(12,6) << Remove(11,8))
+            << (SignalList() << Remove(11,2));
+    QTest::newRow("i(12,6),r(8,4)")
+            << (SignalList() << Insert(12,6) << Remove(8,4))
+            << (SignalList() << Remove(8,4) << Insert(8,6));
+    QTest::newRow("i(12,6),r(2,4)")
+            << (SignalList() << Insert(12,6) << Remove(2,4))
+            << (SignalList() << Remove(2,4) << Insert(8,6));
+    QTest::newRow("i(12,6),r(18,4)")
+            << (SignalList() << Insert(12,6) << Remove(18,4))
+            << (SignalList() << Remove(12,4) << Insert(12,6));
+    QTest::newRow("i(12,6),r(20,4)")
+            << (SignalList() << Insert(12,6) << Remove(20,4))
+            << (SignalList() << Remove(14,4) << Insert(12,6));
+
+    // Insert,then move
+    QTest::newRow("i(12,6),m(12-5,6)")
+            << (SignalList() << Insert(12,6) << Move(12,5,6))
+            << (SignalList() << Insert(5,6));
+    QTest::newRow("i(12,6),m(10-5,4)")
+            << (SignalList() << Insert(12,6) << Move(10,5,4))
+            << (SignalList() << Remove(10,2,0) << Insert(5,2,0) << Insert(7,2) << Insert(14,4));
+    QTest::newRow("i(12,6),m(16-5,4)")
+            << (SignalList() << Insert(12,6) << Move(16,5,4))
+            << (SignalList() << Remove(12,2,0) << Insert(5,2) << Insert(7,2,0) << Insert(16,4));
+    QTest::newRow("i(12,6),m(13-5,4)")
+            << (SignalList() << Insert(12,6) << Move(13,5,4))
+            << (SignalList() << Insert(5,4) << Insert(16,2));
+    QTest::newRow("i(12,6),m(14-5,4)")
+            << (SignalList() << Insert(12,6) << Move(14,5,4))
+            << (SignalList() << Insert(5,4) << Insert(16,2));
+    QTest::newRow("i(12,6),m(12-5,4)")
+            << (SignalList() << Insert(12,6) << Move(12,5,4))
+            << (SignalList() << Insert(5,4) << Insert(16,2));
+    QTest::newRow("i(12,6),m(11-5,8)")
+            << (SignalList() << Insert(12,6) << Move(11,5,8))
+            << (SignalList() << Remove(11,1,0) << Remove(11,1,1) << Insert(5,1,0) << Insert(6,6) << Insert(12,1,1));
+    QTest::newRow("i(12,6),m(8-5,4)")
+            << (SignalList() << Insert(12,6) << Move(8,5,4))
+            << (SignalList() << Remove(8,4,0) << Insert(5,4,0) << Insert(12,6));
+    QTest::newRow("i(12,6),m(2-5,4)")
+            << (SignalList() << Insert(12,6) << Move(2,5,4))
+            << (SignalList() << Remove(2,4,0) << Insert(5,4,0) << Insert(12,6));
+    QTest::newRow("i(12,6),m(18-5,4)")
+            << (SignalList() << Insert(12,6) << Move(18,5,4))
+            << (SignalList() << Remove(12,4,0) << Insert(5,4,0) << Insert(16,6));
+    QTest::newRow("i(12,6),m(20-5,4)")
+            << (SignalList() << Insert(12,6) << Move(20,5,4))
+            << (SignalList() << Remove(14,4,0) << Insert(5,4,0) << Insert(16,6));
+
+    QTest::newRow("i(12,6),m(5-13,11)")
+            << (SignalList() << Insert(12,6) << Move(5,11,8))
+            << (SignalList() << Remove(5,7,0) << Insert(5,5) << Insert(11,7,0) << Insert(18,1));
+
+    QTest::newRow("i(12,6),m(12-23,6)")
+            << (SignalList() << Insert(12,6) << Move(12,23,6))
+            << (SignalList() << Insert(23,6));
+    QTest::newRow("i(12,6),m(10-23,4)")
+            << (SignalList() << Insert(12,6) << Move(10,23,4))
+            << (SignalList() << Remove(10,2,0) << Insert(10,4) << Insert(23,2,0) << Insert(25,2));
+    QTest::newRow("i(12,6),m(16-23,4)")
+            << (SignalList() << Insert(12,6) << Move(16,23,4))
+            << (SignalList() << Remove(12,2,0) << Insert(12,4) << Insert(23,2) << Insert(25,2,0));
+    QTest::newRow("i(12,6),m(13-23,4)")
+            << (SignalList() << Insert(12,6) << Move(13,23,4))
+            << (SignalList() << Insert(12,2) << Insert(23,4));
+    QTest::newRow("i(12,6),m(14-23,4)")
+            << (SignalList() << Insert(12,6) << Move(14,23,4))
+            << (SignalList() << Insert(12,2) << Insert(23,4));
+    QTest::newRow("i(12,6),m(12-23,4)")
+            << (SignalList() << Insert(12,6) << Move(12,23,4))
+            << (SignalList() << Insert(12,2) << Insert(23,4));
+    QTest::newRow("i(12,6),m(11-23,8)")
+            << (SignalList() << Insert(12,6) << Move(11,23,8))
+            << (SignalList() << Remove(11,1,0) << Remove(11,1,1) << Insert(23,1,0)<< Insert(24,6) << Insert(30,1,1));
+    QTest::newRow("i(12,6),m(8-23,4)")
+            << (SignalList() << Insert(12,6) << Move(8,23,4))
+            << (SignalList() << Remove(8,4,0) << Insert(8,6) << Insert(23,4,0));
+    QTest::newRow("i(12,6),m(2-23,4)")
+            << (SignalList() << Insert(12,6) << Move(2,23,4))
+            << (SignalList() << Remove(2,4,0) << Insert(8,6) << Insert(23,4,0));
+    QTest::newRow("i(12,6),m(18-23,4)")
+            << (SignalList() << Insert(12,6) << Move(18,23,4))
+            << (SignalList() << Remove(12,4,0) << Insert(12,6) << Insert(23,4,0));
+    QTest::newRow("i(12,6),m(20-23,4)")
+            << (SignalList() << Insert(12,6) << Move(20,23,4))
+            << (SignalList() << Remove(14,4,0) << Insert(12,6) << Insert(23,4,0));
+
+    QTest::newRow("i(12,6),m(11-23,10)")
+            << (SignalList() << Insert(12,6) << Move(11,23,10))
+            << (SignalList() << Remove(11,1,0) << Remove(11,3,1) << Insert(23,1,0) << Insert(24,6) << Insert(30,3,1));
+
+    // Insert,then change
+    QTest::newRow("i(12,6),c(12,6)")
+            << (SignalList() << Insert(12,6) << Change(12,6))
+            << (SignalList() << Insert(12,6));
+    QTest::newRow("i(12,6),c(10,6)")
+            << (SignalList() << Insert(12,6) << Change(10,6))
+            << (SignalList() << Insert(12,6) << Change(10,2));
+    QTest::newRow("i(12,6),c(16,4)")
+            << (SignalList() << Insert(12,6) << Change(16,4))
+            << (SignalList() << Insert(12,6) << Change(18,2));
+    QTest::newRow("i(12,6),c(13,4)")
+            << (SignalList() << Insert(12,6) << Change(13,4))
+            << (SignalList() << Insert(12,6));
+    QTest::newRow("i(12,6),c(14,4)")
+            << (SignalList() << Insert(12,6) << Change(14,4))
+            << (SignalList() << Insert(12,6));
+    QTest::newRow("i(12,6),c(12,4)")
+            << (SignalList() << Insert(12,6) << Change(12,4))
+            << (SignalList() << Insert(12,6));
+    QTest::newRow("i(12,6),c(11,8)")
+            << (SignalList() << Insert(12,6) << Change(11,8))
+            << (SignalList() << Insert(12,6) << Change(11,1) << Change(18,1));
+    QTest::newRow("i(12,6),c(8,4)")
+            << (SignalList() << Insert(12,6) << Change(8,4))
+            << (SignalList() << Insert(12,6) << Change(8,4));
+    QTest::newRow("i(12,6),c(2,4)")
+            << (SignalList() << Insert(12,6) << Change(2,4))
+            << (SignalList() << Insert(12,6) << Change(2,4));
+    QTest::newRow("i(12,6),c(18,4)")
+            << (SignalList() << Insert(12,6) << Change(18,4))
+            << (SignalList() << Insert(12,6) << Change(18,4));
+    QTest::newRow("i(12,6),c(20,4)")
+            << (SignalList() << Insert(12,6) << Change(20,4))
+            << (SignalList() << Insert(12,6) << Change(20,4));
+
+    // Remove,then insert
+    QTest::newRow("r(12,6),i(12,6)")
+            << (SignalList() << Remove(12,6) << Insert(12,6))
+            << (SignalList() << Remove(12,6) << Insert(12,6));
+    QTest::newRow("r(12,6),i(10,4)")
+            << (SignalList() << Remove(12,6) << Insert(10,14))
+            << (SignalList() << Remove(12,6) << Insert(10,14));
+    QTest::newRow("r(12,6),i(16,4)")
+            << (SignalList() << Remove(12,6) << Insert(16,4))
+            << (SignalList() << Remove(12,6) << Insert(16,4));
+    QTest::newRow("r(12,6),i(13,4)")
+            << (SignalList() << Remove(12,6) << Insert(13,4))
+            << (SignalList() << Remove(12,6) << Insert(13,4));
+    QTest::newRow("r(12,6),i(14,4)")
+            << (SignalList() << Remove(12,6) << Insert(14,4))
+            << (SignalList() << Remove(12,6) << Insert(14,4));
+    QTest::newRow("r(12,6),i(12,4)")
+            << (SignalList() << Remove(12,6) << Insert(12,4))
+            << (SignalList() << Remove(12,6) << Insert(12,4));
+    QTest::newRow("r(12,6),i(11,8)")
+            << (SignalList() << Remove(12,6) << Insert(11,8))
+            << (SignalList() << Remove(12,6) << Insert(11,8));
+    QTest::newRow("r(12,6),i(8,4)")
+            << (SignalList() << Remove(12,6) << Insert(8,4))
+            << (SignalList() << Remove(12,6) << Insert(8,4));
+    QTest::newRow("r(12,6),i(2,4)")
+            << (SignalList() << Remove(12,6) << Insert(2,4))
+            << (SignalList() << Remove(12,6) << Insert(2,4));
+    QTest::newRow("r(12,6),i(18,4)")
+            << (SignalList() << Remove(12,6) << Insert(18,4))
+            << (SignalList() << Remove(12,6) << Insert(18,4));
+    QTest::newRow("r(12,6),i(20,4)")
+            << (SignalList() << Remove(12,6) << Insert(20,4))
+            << (SignalList() << Remove(12,6) << Insert(20,4));
+
+    // Move,then insert
+    QTest::newRow("m(12-5,6),i(12,6)")
+            << (SignalList() << Move(12,5,6) << Insert(12,6))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(12,6));
+    QTest::newRow("m(12-5,6),i(10,4)")
+            << (SignalList() << Move(12,5,6) << Insert(10,4))
+            << (SignalList() << Remove(12,5,0) << Remove(12,1,1) << Insert(5,5,0) << Insert(10,4) << Insert(14,1,1));
+    QTest::newRow("m(12-5,6),i(16,4)")
+            << (SignalList() << Move(12,5,6) << Insert(16,4))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(16,4));
+    QTest::newRow("m(12-5,6),i(13,4)")
+            << (SignalList() << Move(12,5,6) << Insert(13,4))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(13,4));
+    QTest::newRow("m(12-5,6),i(14,4)")
+            << (SignalList() << Move(12,5,6) << Insert(14,4))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(14,4));
+    QTest::newRow("m(12-5,6),i(12,4)")
+            << (SignalList() << Move(12,5,6) << Insert(12,4))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(12,4));
+    QTest::newRow("m(12-5,6),i(11,8)")
+            << (SignalList() << Move(12,5,6) << Insert(11,8))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(11,8));
+    QTest::newRow("m(12-5,6),i(8,4)")
+            << (SignalList() << Move(12,5,6) << Insert(8,4))
+            << (SignalList() << Remove(12,3,0) << Remove(12,3,1) << Insert(5,3,0) << Insert(8,4) << Insert(12,3,1));
+    QTest::newRow("m(12-5,6),i(2,4)")
+            << (SignalList() << Move(12,5,6) << Insert(2,4))
+            << (SignalList() << Remove(12,6,0) << Insert(2,4) << Insert(9,6,0));
+    QTest::newRow("m(12-5,6),i(18,4)")
+            << (SignalList() << Move(12,5,6) << Insert(18,4))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(18,4));
+    QTest::newRow("m(12-5,6),i(20,4)")
+            << (SignalList() << Move(12,5,6) << Insert(20,4))
+            << (SignalList() << Remove(12,6,0) << Insert(5,6,0) << Insert(20,4));
+
+    QTest::newRow("m(12-23,6),i(12,6)")
+            << (SignalList() << Move(12,23,6) << Insert(12,6))
+            << (SignalList() << Remove(12,6,0) << Insert(12,6) << Insert(29,6,0));
+    QTest::newRow("m(12-23,6),i(10,4)")
+            << (SignalList() << Move(12,23,6) << Insert(10,4))
+            << (SignalList() << Remove(12,6,0) << Insert(10,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(16,4)")
+            << (SignalList() << Move(12,23,6) << Insert(16,4))
+            << (SignalList() << Remove(12,6,0) << Insert(16,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(13,4)")
+            << (SignalList() << Move(12,23,6) << Insert(13,4))
+            << (SignalList() << Remove(12,6,0) << Insert(13,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(14,4)")
+            << (SignalList() << Move(12,23,6) << Insert(14,4))
+            << (SignalList() << Remove(12,6,0) << Insert(14,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(12,4)")
+            << (SignalList() << Move(12,23,6) << Insert(12,4))
+            << (SignalList() << Remove(12,6,0) << Insert(12,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(11,8)")
+            << (SignalList() << Move(12,23,6) << Insert(11,8))
+            << (SignalList() << Remove(12,6,0) << Insert(11,8) << Insert(31,6,0));
+    QTest::newRow("m(12-23,6),i(8,4)")
+            << (SignalList() << Move(12,23,6) << Insert(8,4))
+            << (SignalList() << Remove(12,6,0) << Insert(8,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(2,4)")
+            << (SignalList() << Move(12,23,6) << Insert(2,4))
+            << (SignalList() << Remove(12,6,0) << Insert(2,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(18,4)")
+            << (SignalList() << Move(12,23,6) << Insert(18,4))
+            << (SignalList() << Remove(12,6,0) << Insert(18,4) << Insert(27,6,0));
+    QTest::newRow("m(12-23,6),i(20,4)")
+            << (SignalList() << Move(12,23,6) << Insert(20,4))
+            << (SignalList() << Remove(12,6,0) << Insert(20,4) << Insert(27,6,0));
+
+    // Move,then remove
+    QTest::newRow("m(12-5,6),r(12,6)")
+            << (SignalList() << Move(12,5,6) << Remove(12,6))
+            << (SignalList() << Remove(6,6) << Remove(6,6,0) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(10,4)")
+            << (SignalList() << Move(12,5,6) << Remove(10,4))
+            << (SignalList() << Remove(5,3) << Remove(9,5,0) << Remove(9,1) << Insert(5,5,0));
+    QTest::newRow("m(12-5,6),r(16,4)")
+            << (SignalList() << Move(12,5,6) << Remove(16,4))
+            << (SignalList() << Remove(10,2) << Remove(10,6,0) << Remove(10,2) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(13,4)")
+            << (SignalList() << Move(12,5,6) << Remove(13,4))
+            << (SignalList() << Remove(7,4) << Remove(8,6,0) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(14,4)")
+            << (SignalList() << Move(12,5,6) << Remove(14,4))
+            << (SignalList() << Remove(8,4) << Remove(8,6,0) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(12,4)")
+            << (SignalList() << Move(12,5,6) << Remove(12,4))
+            << (SignalList() << Remove(6,4) << Remove(8,6,0) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(11,8)")
+            << (SignalList() << Move(12,5,6) << Remove(11,8))
+            << (SignalList() << Remove(5,7) << Remove(5,6,0) << Remove(5,1) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(8,4)")
+            << (SignalList() << Move(12,5,6) << Remove(8,4))
+            << (SignalList() << Remove(5,1) << Remove(11,3,0) << Remove(11,3) << Insert(5,3,0));
+    QTest::newRow("m(12-5,6),r(2,4)")
+            << (SignalList() << Move(12,5,6) << Remove(2,4))
+            << (SignalList() << Remove(2,3) << Remove(9,1) << Remove(9,5,0) << Insert(2,5,0));
+    QTest::newRow("m(12-5,6),r(6,4)")
+            << (SignalList() << Move(12,5,6) << Remove(6,4))
+            << (SignalList() << Remove(12,1,0) << Remove(12,4) << Remove(12,1,1) << Insert(5,1,0) << Insert(6,1,1));
+    QTest::newRow("m(12-5,6),r(18,4)")
+            << (SignalList() << Move(12,5,6) << Remove(18,4))
+            << (SignalList() << Remove(12,6,0) << Remove(12,4) << Insert(5,6,0));
+    QTest::newRow("m(12-5,6),r(20,4)")
+            << (SignalList() << Move(12,5,6) << Remove(20,4))
+            << (SignalList() << Remove(12,6,0) << Remove(14,4) << Insert(5,6,0));
+
+    QTest::newRow("m(12-23,6),r(12,6)")
+            << (SignalList() << Move(12,23,6) << Remove(12,6))
+            << (SignalList() << Remove(12,6,0) << Remove(12,6) << Insert(17,6,0));
+    QTest::newRow("m(12-23,6),r(10,4)")
+            << (SignalList() << Move(12,23,6) << Remove(10,4))
+            << (SignalList() << Remove(10,2) << Remove(10,6,0) << Remove(10,2) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(16,4)")
+            << (SignalList() << Move(12,23,6) << Remove(16,4))
+            << (SignalList() << Remove(12,6,0) << Remove(16,4) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(13,4)")
+            << (SignalList() << Move(12,23,6) << Remove(13,4))
+            << (SignalList() << Remove(12,6,0) << Remove(13,4) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(14,4)")
+            << (SignalList() << Move(12,23,6) << Remove(14,4))
+            << (SignalList() << Remove(12,6,0) << Remove(14,4) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(12,4)")
+            << (SignalList() << Move(12,23,6) << Remove(12,4))
+            << (SignalList() << Remove(12,6,0) << Remove(12,4) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(11,8)")
+            << (SignalList() << Move(12,23,6) << Remove(11,8))
+            << (SignalList() << Remove(11,1) << Remove(11,6,0) << Remove(11,7) << Insert(15,6,0));
+    QTest::newRow("m(12-23,6),r(8,4)")
+            << (SignalList() << Move(12,23,6) << Remove(8,4))
+            << (SignalList() << Remove(8,4) << Remove(8,6,0) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(2,4)")
+            << (SignalList() << Move(12,23,6) << Remove(2,4))
+            << (SignalList() << Remove(2,4) << Remove(8,6,0) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(18,4)")
+            << (SignalList() << Move(12,23,6) << Remove(18,4))
+            << (SignalList() << Remove(12,6,0) << Remove(18,4) << Insert(19,6,0));
+    QTest::newRow("m(12-23,6),r(20,4)")
+            << (SignalList() << Move(12,23,6) << Remove(20,4))
+            << (SignalList() << Remove(12,1) << Remove(12,5,0) << Remove(20,3) << Insert(20,5,0));
 }
 
 void tst_qdeclarativemodelchange::sequence()
@@ -560,24 +733,22 @@ void tst_qdeclarativemodelchange::sequence()
 
     foreach (const Signal &signal, input) {
         if (signal.isRemove())
-            set.insertRemove(signal.start, signal.end);
+            set.remove(signal.index, signal.count);
         else if (signal.isInsert())
-            set.insertInsert(signal.start, signal.end);
+            set.insert(signal.index, signal.count);
         else if (signal.isMove())
-            set.insertMove(signal.start, signal.end, signal.to);
+            set.move(signal.index, signal.to, signal.count);
         else if (signal.isChange())
-            set.insertChange(signal.start, signal.end);
+            set.change(signal.index, signal.count);
     }
 
     SignalList changes;
     foreach (const QDeclarativeChangeSet::Remove &remove, set.removes())
-        changes << Remove(remove.start, remove.end);
+        changes << Remove(remove.index, remove.count, remove.moveId);
     foreach (const QDeclarativeChangeSet::Insert &insert, set.inserts())
-        changes << Insert(insert.start, insert.end);
-    foreach (const QDeclarativeChangeSet::Move &move, set.moves())
-        changes << Move(move.start, move.end, move.to);
+        changes << Insert(insert.index, insert.count, insert.moveId);
     foreach (const QDeclarativeChangeSet::Change &change, set.changes())
-        changes << Change(change.start, change.end);
+        changes << Change(change.index, change.count);
 
 #ifdef VERIFY_EXPECTED_OUTPUT
     QVector<int> list;